51 Most Important GK Questions on World Geography for Competitive Exams | AISSEE | KV | JNV | Entrance Exam

Question : What is the longest river in the world?
Answer : The Nile River.

Question : Which mountain range separates Europe and Asia?
Answer : The Ural Mountains.

Question : What is the capital of Australia?
Answer : Canberra.

Question : Which country is known as the Land of the Rising Sun?
Answer : Japan.

Question : Which desert is the largest in the world?
Answer : The Sahara Desert.

Question : What is the world's largest ocean?
Answer : The Pacific Ocean.

Question : Which African country is known as the "Pearl of Africa"?
Answer : Uganda.

Question : Which river is the longest in South America?
Answer : The Amazon River.

Question : What is the capital of Brazil?
Answer : Brasília.

Question : Which strait separates Asia and North America?
Answer : The Bering Strait.

Question : What is the smallest continent in the world?
Answer : Australia.

Question : Which country is known as the "Land of the Midnight Sun"?
Answer : Norway.

Question : What is the world's highest mountain?
Answer : Mount Everest.

Question : Which country is known as the "Land of a Thousand Lakes"?
Answer : Finland.

Question : Which river is often called the "Cradle of Civilization"?
Answer : The Tigris and Euphrates Rivers.

Question : What is the capital of Russia?
Answer : Moscow.

Question : Which African country is known as the "Rainbow Nation"?
Answer : South Africa.

Question : What is the largest lake in Africa?
Answer : Lake Victoria.

Question : Which ocean lies between Africa and Australia?
Answer : The Indian Ocean.

Question : What is the capital of France?
Answer : Paris.

Question : Which strait separates Spain and Morocco?
Answer : The Strait of Gibraltar.

Question : What is the world's largest island?
Answer : Greenland.

Question : Which river is the longest in Europe?
Answer : The Volga River.

Question : What is the capital of China?
Answer : Beijing.

Question : Which desert is often called the "Desert of Death"?
Answer : The Atacama Desert.

Question : What is the largest country by land area in the world?
Answer : Russia.

Question : Which country is known as the "Land of the Rising Sun"?
Answer : Japan.

Question : What is the capital of Egypt?
Answer : Cairo.

Question : Which river is the longest in the United States?
Answer : The Missouri River.

Question : What is the capital of India?
Answer : New Delhi.

Question : Which mountain range runs along the western coast of South America?
Answer : The Andes.

Question : What is the largest desert in North America?
Answer : The Great Basin Desert.

Question : Which river is often called the "Father of Waters"?
Answer : The Mississippi River.

Question : What is the capital of South Africa?
Answer : Pretoria (administrative), Bloemfontein (judicial), and Cape Town (legislative).

Question : Which country is known as the "Land of the Midnight Sun"?
Answer : Norway.

Question : What is the world's highest waterfall?
Answer : Angel Falls in Venezuela.

Question : Which river forms part of the border between the United States and Mexico?
Answer : The Rio Grande.

Question : What is the capital of Canada?
Answer : Ottawa.

Question : Which strait separates the Red Sea and the Gulf of Aden?
Answer : The Bab-el-Mandeb.

Question : What is the world's largest coral reef system?
Answer : The Great Barrier Reef in Australia.

Question : Which country is known as the "Land of Fire and Ice"?
Answer : Iceland.

Question : What is the capital of Italy?
Answer : Rome.

Question : Which river is the longest in Africa?
Answer : The Nile River.

Question : What is the largest saltwater lake in the world?
Answer : The Caspian Sea.

Question : Which country is known as the "Land of the Rising Sun"?
Answer : Japan.

Question : What is the capital of Argentina?
Answer : Buenos Aires.

Question : Which river is often called the "Mighty Mississippi"?
Answer : The Mississippi River.

Question : What is the world's largest hot desert?
Answer : The Sahara Desert.

Question : Which country is known as the "Land of the Thunder Dragon"?
Answer : Bhutan.

Question : What is the capital of Greece?
Answer : Athens.

Question : Which river is often called the "Yellow River" due to its color?
Answer : The Huang He (Yellow River) in China.

51 Most Important One Word Substitution for Competitive Exams | AISSEE | KV | JNV | Entrance Exam 

Question : What is the term for a person who can speak two languages fluently?
Answer : Bilingual.

Question : What is the term for the study of insects?
Answer : Entomology.

Question : What do you call a person who studies ancient civilizations and cultures?
Answer : Archaeologist.

Question : What is the word for a person who is skilled in a particular craft or art?
Answer : Artisan.

Question : What is the term for a person who is addicted to stealing?
Answer : Kleptomaniac.

Question : What is the word for a person who loves and collects books?
Answer : Bibliophile.

Question : What do you call a person who specializes in the treatment of children?
Answer : Pediatrician.

Question : What is the term for a person who pretends to be what they are not, especially for deceptive purposes?
Answer : Impostor.

Question : What is the word for a person who is skilled in both arts and sciences?
Answer : Polymath.

Question : What is the term for a person who believes in the existence of a single deity?
Answer : Monotheist.

Question : What is the word for a person who collects and studies coins and currency?
Answer : Numismatist.

Question : What is the term for a person who is excessively fond of eating and drinking?
Answer : Glutton.

Question : What do you call a person who has a strong dislike of foreigners?
Answer : Xenophobe.

Question : What is the word for a person who makes and repairs shoes?
Answer : Cobbler.

Question : What is the term for a person who is passionate about collecting and studying butterflies and moths?
Answer : Lepidopterist.

Question : What is the word for a person who is unable to sleep?
Answer : Insomniac.

Question : What do you call a person who travels to explore and document new places and cultures?
Answer : Explorer.

Question : What is the term for a person who is excessively concerned about their health and fitness?
Answer : Hypochondriac.

Question : What is the word for a person who believes in the equality of all individuals regardless of their race, gender, or ethnicity?
Answer : Egalitarian.

Question : What is the term for a person who is skilled in mathematics?
Answer : Mathematician.

Question : What do you call a person who writes under a pseudonym or pen name?
Answer : Pseudonymous.

Question : What is the word for a person who specializes in the study of human societies and cultures?
Answer : Anthropologist.

Question : What is the term for a person who is indifferent to pleasure or pain?
Answer : Stoic.

Question : What do you call a person who is passionate about collecting and studying old and rare coins?
Answer : Numismatist.

Question : What is the word for a person who speaks out against or opposes the use of war and violence?
Answer : Pacifist.

Question : What is the term for a person who is excessively fond of socializing and attending parties?
Answer : Socialite.

Question : What is the word for a person who believes that pleasure is the highest good?
Answer : Hedonist.

Question : What do you call a person who specializes in the treatment of the skin and its diseases?
Answer : Dermatologist.

Question : What is the term for a person who is skilled in the art of speech and persuasion?
Answer : Orator.

Question : What is the word for a person who is passionate about collecting and studying stamps?
Answer : Philatelist.

Question : What is the term for a person who believes in the existence of many gods?
Answer : Polytheist.

Question : What do you call a person who is passionate about collecting and studying fossils?
Answer : Paleontologist.

Question : What is the word for a person who is skilled in the study of the stars and celestial bodies?
Answer : Astronomer.

Question : What is the term for a person who is excessively preoccupied with their own appearance and self-image?
Answer : Narcissist.

Question : What do you call a person who is passionate about collecting and studying old and rare books?
Answer : Bibliophile.

Question : What is the word for a person who is passionate about protecting and preserving the environment?
Answer : Environmental activist.

Question : What is the term for a person who is skilled in the art of making and repairing watches and clocks?
Answer : Horologist.

Question : What do you call a person who is passionate about collecting and studying birds?
Answer : Ornithologist.

Question : What is the word for a person who is passionate about collecting and studying insects?
Answer : Entomologist.

Question : What is the term for a person who is passionate about collecting and studying old and rare maps?
Answer : Cartophile.

Question : What do you call a person who is excessively concerned with their own interests and well-being?
Answer : Egoist.

Question : What is the word for a person who is passionate about collecting and studying old and rare documents, especially historical ones?
Answer : Archivist.

Question : What is the term for a person who is skilled in the art of making and repairing musical instruments?
Answer : Luthier.

Question : What do you call a person who is passionate about collecting and studying fish?
Answer : Ichthyologist.

Question : What is the word for a person who is excessively afraid of enclosed spaces or being trapped in small spaces?
Answer : Claustrophobic.

Question : What is the term for a person who is passionate about collecting and studying rocks and minerals?
Answer : Geologist.

Question : What do you call a person who is passionate about collecting and studying antique and rare items, such as furniture and art?
Answer : Antiquarian.

Question : What is the word for a person who is skilled in the art of making and repairing jewelry?
Answer : Jeweler.

Question : What is the term for a person who is passionate about collecting and studying fungi, including mushrooms?
Answer : Mycologist.

Question : What do you call a person who is passionate about collecting and studying flags?
Answer : Vexillologist.

Question : What is the word for a person who is passionate about collecting and studying rare and valuable wines?
Answer : Oenophile.

51 Important GK Questions on Human Blood for Competitive Exams | GK Questions with Answers | AISSEE | KV | JNV | Entrance Exam

What is the primary function of blood in the human body?

Answer: The primary function of blood is to transport oxygen and nutrients to cells and remove waste products.

What is the pH range of normal human blood?

Answer: The pH range of normal human blood is approximately 7.35 to 7.45.

What is the percentage of water in human blood?

Answer: Blood is approximately 90% water.

Which element gives blood its red color?

Answer: Hemoglobin, a protein containing iron, gives blood its red color.

What is the average volume of blood in an adult human body?

Answer: The average volume of blood in an adult human body is about 5 liters.

Which type of blood cells are responsible for oxygen transport in the blood?

Answer: Red blood cells (erythrocytes) are responsible for oxygen transport.

What is the primary function of white blood cells (leukocytes)?

Answer: White blood cells primarily function to fight infection and foreign invaders.

Which component of blood is responsible for clotting?

Answer: Platelets (thrombocytes) are responsible for blood clotting.

What is the process by which blood cells are formed?

Answer: Hematopoiesis is the process by which blood cells are formed in the bone marrow.

What is the medical term for a decrease in the number of red blood cells or a decrease in the amount of hemoglobin in the blood?

Answer: Anemia is the medical term for this condition.

Which blood type is considered the universal donor?

Answer: Blood type O negative is considered the universal donor.

Which blood type is considered the universal recipient?

Answer: Blood type AB positive is considered the universal recipient.

What is the Rh factor in blood typing?

Answer: The Rh factor is a protein found on the surface of red blood cells. It can be either Rh-positive or Rh-negative.

What happens when an Rh-negative mother carries an Rh-positive fetus?

Answer: If an Rh-negative mother carries an Rh-positive fetus, there can be a risk of hemolytic disease of the newborn (HDN) in subsequent pregnancies.

What is the most common blood type in the United States?

Answer: Blood type O positive is the most common blood type in the United States.

What is the rarest blood type?

Answer: Blood type AB negative is considered the rarest blood type.

What is the function of plasma in blood?

Answer: Plasma is the liquid component of blood that carries nutrients, hormones, and waste products.

What is the normal range for a person's platelet count?

Answer: The normal range for platelet count in a healthy individual is between 150,000 and 450,000 platelets per microliter of blood.

What is the purpose of the ABO blood group system?

Answer: The ABO blood group system determines the presence or absence of A and B antigens on the surface of red blood cells.

What is the most common ABO blood type in the world?

Answer: Blood type O is the most common ABO blood type in the world.

Which type of white blood cells are responsible for antibody production?

Answer: B lymphocytes (B cells) are responsible for antibody production.

What is the term for the process of blood cell formation in the bone marrow?

Answer: Hematopoiesis is the term for the process of blood cell formation.

What is the condition characterized by an abnormal increase in the number of red blood cells?

Answer: Polycythemia is the condition characterized by an abnormal increase in red blood cells.

What is the medical term for a high level of glucose (sugar) in the blood?

Answer: Hyperglycemia is the medical term for a high level of glucose in the blood.

Which organ in the human body is responsible for filtering and removing damaged blood cells?

Answer: The spleen is responsible for filtering and removing damaged blood cells.

What is the function of hemostasis in the blood?

Answer: Hemostasis is the process of stopping bleeding by forming blood clots.

Which gas binds to hemoglobin in red blood cells for oxygen transport?

Answer: Oxygen binds to hemoglobin in red blood cells for transport.

What is the condition where blood pressure is consistently elevated?

Answer: Hypertension, or high blood pressure, is the condition where blood pressure is consistently elevated.

What is the medical term for low blood pressure?

Answer: Hypotension is the medical term for low blood pressure.

Which blood cells are responsible for phagocytosis, engulfing and destroying foreign invaders?

Answer: White blood cells known as neutrophils are responsible for phagocytosis.

What is the role of fibrin in blood clot formation?

Answer: Fibrin is a protein that forms a mesh-like structure to trap blood cells, leading to clot formation.

What is the primary function of platelets in blood clotting?

Answer: Platelets help initiate clotting by adhering to damaged blood vessels and forming a plug.

Which mineral is essential for the formation of hemoglobin in red blood cells?

Answer: Iron is essential for the formation of hemoglobin.

What is the medical term for a decrease in the number of white blood cells?

Answer: Leukopenia is the medical term for a decrease in white blood cells.

Which type of white blood cells are responsible for coordinating the immune response?

Answer: T lymphocytes (T cells) are responsible for coordinating the immune response.

What is the process of red blood cell destruction called?

Answer: Hemolysis is the process of red blood cell destruction.

What is the function of erythropoietin (EPO) in the body?

Answer: Erythropoietin stimulates the production of red blood cells in the bone marrow.

What is the medical term for the formation of blood clots within a blood vessel?

Answer: Thrombosis is the medical term for this condition.

What is the purpose of a blood type crossmatch?

Answer: A blood type crossmatch is performed to ensure compatibility between the donor and recipient before a blood transfusion.

What is the medical term for inflammation of the blood vessels?

Answer: Vasculitis is the medical term for inflammation of blood vessels.

Which blood cell type is most abundant in the blood?

Answer: Red blood cells (erythrocytes) are the most abundant blood cell type.

What is the medical term for an abnormally low red blood cell count?

Answer: Anemia is the medical term for an abnormally low red blood cell count.

What is the term for a hereditary blood disorder that affects the ability of blood to clot?

Answer: Hemophilia is the term for this condition.

What is the function of albumin in blood plasma?

Answer: Albumin in blood plasma helps maintain osmotic pressure and transport various substances.

What is the primary function of basophils in the blood?

Answer: Basophils are involved in allergic reactions and release histamine.

What is the condition characterized by an overproduction of red blood cells due to excessive EPO production?

Answer: Polycythemia vera is the condition characterized by this.

Which blood component is responsible for maintaining blood pressure and fluid balance in the body?

Answer: Blood proteins, including albumin, help maintain blood pressure and fluid balance.

What is the role of monocytes in the immune system?

Answer: Monocytes are white blood cells that can transform into macrophages and play a role in phagocytosis.

What is the condition where there is a deficiency of platelets in the blood?

Answer: Thrombocytopenia is the condition characterized by a deficiency of platelets.

Which blood cells are the smallest in size?

Answer: Platelets are the smallest blood cells.

What is the medical term for a condition where there is an excessive number of white blood cells in the blood?

Answer: Leukocytosis is the medical term for this condition.

51 Important Questions on the Human Body for Competitive Exams with Answers | AISSEE | KV | Navodaya Vidyalaya Entrance Exam

51 Important Questions on the Human Body for Competitive Exams with Answers

Studying the human body is a vital component of life sciences and is often a significant section in competitive exams. Here, we provide 51 important questions on the human body, along with their answers, to help you prepare for your exams more effectively.

1. How many bones are there in the adult human body?

Answer: There are 206 bones in the adult human body.

2. What is the body's largest organ?

Answer: The skin is the body's largest organ.

3. Which gas do we inhale in the highest proportion from the atmosphere?

Answer: We inhale nitrogen in the highest proportion (approximately 78%) from the atmosphere.

4. What is the powerhouse of the cell?

Answer: The mitochondria are often referred to as the powerhouse of the cell.

5. What is the main function of red blood cells?

Answer: Red blood cells (erythrocytes) transport oxygen from the lungs to various tissues in the body and carry carbon dioxide back to the lungs for exhalation.

6. What is the role of the pancreas in the human body?

Answer: The pancreas produces digestive enzymes and regulates blood sugar by secreting insulin and glucagon.

7. Which hormone regulates blood sugar levels in the body?

Answer: Insulin regulates blood sugar levels by facilitating the uptake of glucose into cells.

8. What is the function of the alveoli in the lungs?

Answer: Alveoli are tiny air sacs in the lungs where oxygen is absorbed into the bloodstream and carbon dioxide is removed.

9. Which part of the brain is responsible for regulating basic life functions like breathing and heartbeat?

Answer: The brainstem, specifically the medulla oblongata, regulates basic life functions like breathing and heartbeat.

10. What is the smallest bone in the human body?

Answer: The stapes bone in the human ear is the smallest bone.

11. How many chambers are there in the human heart?

Answer: The human heart has four chambers: two atria (upper chambers) and two ventricles (lower chambers).

12. What is the function of the kidneys in the body?

Answer: The kidneys filter waste products from the blood, regulate electrolyte balance, and maintain proper fluid balance in the body.

13. Which gas is produced during photosynthesis in plants and is vital for human respiration?

Answer: Oxygen is produced during photosynthesis in plants and is essential for human respiration.

14. What is the largest muscle in the human body?

Answer: The gluteus maximus, the major muscle of the buttocks, is the largest muscle in the human body.

15. What is the purpose of the small intestine in the digestive system?

Answer: The small intestine is responsible for further digestion and absorption of nutrients from food.

16. What is the role of the thyroid gland in the endocrine system?

Answer: The thyroid gland produces hormones that regulate metabolism and influence various bodily functions.

17. What is the purpose of the cerebellum in the brain?

Answer: The cerebellum is responsible for coordination, balance, and fine motor control.

18. What is the function of the eustachian tube in the ears?

Answer: The eustachian tube equalizes air pressure between the middle ear and the atmosphere.

19. Which part of the eye is responsible for controlling the amount of light that enters?

Answer: The iris controls the size of the pupil to regulate the amount of light entering the eye.

20. What is the primary function of white blood cells?

Answer: White blood cells (leukocytes) play a vital role in the immune system by defending the body against infections.

21. Which gland is often referred to as the "master gland" of the endocrine system?

Answer: The pituitary gland is often called the "master gland" because it regulates the function of other endocrine glands.

22. What is the purpose of the gallbladder in the digestive process?

Answer: The gallbladder stores and concentrates bile, which is released into the small intestine to aid in digestion.

23. Which organ is responsible for detoxifying the blood and producing bile?

Answer: The liver is responsible for detoxifying the blood and producing bile for digestion.

24. What is the function of the spleen in the human body?

Answer: The spleen filters and stores blood, removes damaged blood cells, and aids in immune responses.

25. What is the name of the longest nerve in the human body?

Answer: The longest nerve in the human body is the sciatic nerve.

26. Which hormone is responsible for controlling the body's sleep-wake cycle?

Answer: Melatonin is the hormone responsible for regulating the sleep-wake cycle.

27. What is the role of the cornea in the eye?

Answer: The cornea is the transparent front part of the eye that focuses light onto the retina.

28. Which part of the brain is associated with memory and learning?

Answer: The hippocampus is closely associated with memory and learning processes.

29. What is the purpose of the thymus gland in the immune system?

Answer: The thymus gland plays a role in the development of T-lymphocytes (T-cells), an essential component of the immune system.

30. Which part of the ear is responsible for transmitting sound vibrations to the inner ear?

Answer: The ossicles (specifically, the stapes) transmit sound vibrations from the middle ear to the inner ear.

31. What is the function of the epiglottis in the throat?

Answer: The epiglottis prevents food from entering the windpipe when swallowing.

32. Which organ is responsible for producing insulin in the body?

Answer: The pancreas produces insulin, a hormone that regulates blood sugar levels.

33. What is the role of the uvula in the mouth?

Answer: The uvula plays a role in speech and preventing food or liquid from entering the nasal passages.

34. What is the primary function of the trachea?

Answer: The trachea, or windpipe, provides an airway for breathing, carrying air to and from the lungs.

35. Which part of the nervous system controls involuntary actions like breathing and heart rate?

Answer: The autonomic nervous system controls involuntary functions, including breathing and heart rate.

36. What is the purpose of the semicircular canals in the inner ear?

Answer: The semicircular canals are responsible for maintaining balance and spatial orientation.

37. Which gland is responsible for producing melatonin, a hormone that regulates sleep patterns?

Answer: The pineal gland produces melatonin, which helps regulate the sleep-wake cycle.

38. What is the main function of the corona radiata in the brain?

Answer: The corona radiata contains nerve fibers that connect different parts of the brain.

39. Which part of the human body is responsible for regulating body temperature and storing fat for energy?

Answer: Adipose tissue (fat) plays a role in regulating body temperature and storing energy.

40. What is the role of the adrenal glands in the endocrine system?

Answer: The adrenal glands produce hormones like adrenaline and cortisol, which are involved in the body's stress response and energy regulation.

41. Which bone in the human body is often called the "funny bone"?

Answer: The ulna, one of the two bones in the forearm, is often referred to as the "funny bone."

42. What is the primary function of the bronchial tubes in the respiratory system?

Answer: Bronchial tubes (bronchi) carry air from the trachea to the lungs and vice versa.

43. What is the purpose of the cerebrum in the brain?

Answer: The cerebrum is responsible for higher cognitive functions, such as thinking, memory, and voluntary muscle movement.

44. Which organ is responsible for filtering and cleaning the blood?

Answer: The kidneys filter and clean the blood by removing waste products and excess fluids.

45. What is the name of the muscle that separates the chest from the abdomen and aids in breathing?

Answer: The diaphragm is the muscle that separates the chest from the abdomen and plays a crucial role in breathing.

46. What is the function of the synovial fluid in the joints?

Answer: Synovial fluid lubricates and cushions the joints, allowing for smooth movement.

47. Which part of the eye is responsible for focusing on objects at different distances?

Answer: The lens of the eye is responsible for changing shape to focus on objects at various distances.

48. What is the role of the corpus callosum in the brain?

Answer: The corpus callosum connects the two hemispheres of the brain, allowing them to communicate and share information.

49. Which gland is responsible for controlling metabolism and energy production in the body?

Answer: The thyroid gland controls metabolism and influences energy production in the body.

50. What is the purpose of peristalsis in the digestive system?

Answer: Peristalsis is the wave-like muscle contractions that move food and fluids through the digestive system.

51. Which part of the ear is responsible for amplifying sound vibrations?

Answer: The middle ear, which includes the three ossicles (bones), amplifies sound vibrations before they reach the inner ear.

These questions and answers cover a wide range of topics related to the human body, including anatomy and physiology. They can serve as a valuable resource for your competitive exam preparation, helping you gain a deeper understanding of the remarkable complexity of the human body. Good luck with your studies!

50+ Important Questions on Human Body for competitive exam | Top GK Questions of Human Body 

At very high altitude the RBC in the human body will – Increase in number
Blood is red in colour due to the presence of – Haemoglobin 
Bones are connected by which tissue – Ligaments
Colour of eye depends upon pigment presence in – Iris
DPT vaccine is helpful in prevent the disease – Diptheria, Pertussis, Tetanus
ECG is used for the diagnosis of ailments of – Heart 
Failure of which gland results in diabetes in human body – Pancreas
How many basic tastes can humans sense – 5 (sweet, sour, bitter, salty and umami) 
Image formed on which part of eye – Retina
In human body dialysis is used for failure of which organ – Kidney
In human body formation of red blood cells occur at – Bone marrow
In human body where is tibia bone found – Leg
In human body which organ has maximum power of generation – Liver
In human eye the least distance of distinct vision is – 25 cm
In human universal donor has the blood group of – O
Myopia and hypermetropia diseases connected with – Eyes
Name the largest bone in human body – Femur
Name the largest joint in the human body – Knee
Name the largest vein in human body – Interior Venacava
Name the largest white blood corpuscle – Monocyte
Name the longest muscle in human body – Sartorus muscle 
Name the most commonly broken bone in the human body – Clavicle (collarbone)
Name the smallest bone in human body – Stapes
Name the smallest endocrine gland in human body – Pituitary gland
Name the smallest muscle in the human body – Stapedius 
Our bones and teeth are made of which element – Tricalcium Phosphate
Thalassemia is hereditary diseases which affects – Blood
Transport of oxygen in human body by – Blood 
Universal recipient has the blood group of – AB
What is life span of RBC – 120 days
What is the another name of human voice box – Larynx
What is the average length of large intestine – 1.5 meter
What is the average length of small intestine – 7 meter 
What is the body temperature of healthy human – 36.9 or 27 degree centigrade 
What is the largest part of brain – Cerebrum 
What is the main constituent of hemoglobin – Iron 
What is the number of chormosomes in human cell – 46 (23 pairs)
What is the semi-circular area of nail called – Lunula
What is the total number of bone in human body – 206
Where is mendible bone is located – Jaw
Which component of blood is responsible for clotting – Platelets
Which gland is associated with blood pressure – Adrenal gland
Which gland is associated with disease goiter – thyroid gland
Which hormone is called emergency hormone in human body – Adrenaline gland 
Which instrument is used to measure blood pressure – Sphygnomanometer
Which is the largest blood vessel in human body – Aorta 
Which isotope of cobalt is used in detection of cancer – Cobalt – 60 
Which organ filters blood in human body – Spleen 
Why blood do not clot inside the blood vessel – due to presence of heparin

Most Important Questions on Human Body System for Competitive Exams // Sainik School Entrance Exam // KV // Navodaya Vidyalaya // RIMC

Most Important Questions on Human Body System for Competitive Exams // Sainik School Entrance Exam // KV // Navodaya Vidyalaya // RIMC

A hug or kiss between mother and baby induces the secretion of which hormone - oxytocin
About how much urine is produced in the human body every day - about 1 to 1.5 liters
Blind dot or yellow dot are found in which part of the eye - Retina
How long does it take to circulate blood in the human body - 23 seconds 
How many bones are there in an adult human - 206
How many cells are there in the heart of a human being - 4 
How many layers of skin are there in the epidermis- 5 
How many times does a human heart beat ? 72 times/ minute 
Krebs cycle occurs in which organ - Mitochondria
The exchange of gases in the lungs is done by whom - by Blood
The level of glucose in the blood is expressed in – in milligrams per decilitre
The number of RBCs is more in mountain dwellers, because - the air on the mountain is less condensed
Urea is produced in which organ in the human body - Liver
What causes urine to smell - Due to urea 
What is omnivorous blood group- AB+ 
What is the amount of blood in a human being - about 5-6 liters 
What is the amount of blood of the body weight - 7% 
What is the amount of water in the human body-about 60% 
What is the average pH value of a normal person's blood - 7.35 - 7.45PH
What is the largest part of the body - skin 
What is the life span of white blood Cell (WBC) - 2 to 4 days 
What is the name of the largest cell of the human body - Nervous System
What is the number of amino acids in the human body- 20 
What is the number of chromosomes in the human body - 46 (23 pairs)
What is the pH value of human urine?- 6.0 
What is the process of purification of blood in the human body called - dialysis
What is the respiratory rate of a healthy human being - 16 to 18 times per minute 
What is the shape of DNA called - Double Helix 
What is the study of the beauty of man called - Kelology 
What is the weight of the human brain - 1350 to 1400 grams 
What kind of ties are the bones of our skull interconnected by - Fixed joint
Where is the bone called tibia found in the human body- feet 
Where is the strongest bone in the human body- Jaw bone
Where is vitamin A stored in the human body - Liver 
Where red blood cells (RBC) are mainly formed -in the Bone marrow
Which is the blood pressure measuring instrument –Sphygmomanometer
Which is the enzyme found in saliva- Tylene 
Which is the hardest substance in the human body?- Teeth 
Which is the heaviest organ of the human – Liver
Which is the largest internal organ of the human body - Liver
Which is the largest part of the human brain-Ceribrum
Which is the longest bone in the human body? – The Femur
Which is the most toxic excretory substance- Ammonia
Which is the organ that purifies blood - Kidney
Which is the weakest bone in the human body? -clavicle or collar bone
Which structure of the eye is the most sensitive but does not contain blood vessels- cornea
Who was the discoverer of blood groups? - Carl Landsteiner

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