Free Human Body and Health MCQs with Answers

321. Inflammation of liver is caused by____________?

• A. Cholera
• B. Hepatitis
• C. Typhoid
• D. Jaundice

Explanation: Hepatitis means inflammation of the liver and is commonly caused by hepatitis viruses, though other causes also exist. Jaundice is a symptom that may result from liver disease, not the name of the inflammation itself.

322. Milk contains water

• A. 70%
• B. 75%
• C. 87%
• D. 90%Exploring Educational Science Kits

Explanation: Milk is approximately 87% water, with the remainder consisting mainly of fats, proteins, lactose, minerals, and vitamins. The other percentages are too low for ordinary cow's milk.

323. Which of the following disease affects the skin ?

• A. Rickets
• B. Osteoporosis
• C. Anemia
• D. Pellagra

Explanation: Pellagra, caused mainly by niacin deficiency, characteristically produces dermatitis, along with diarrhoea and mental changes. Rickets and osteoporosis affect bones, while anemia affects the blood.

324. BCG vaccine is used to produce immunity against___________?

• A. Whooping cough
• B. Tuberculosis
• C. Virus fever
• D. Smallpox

Explanation: BCG, or Bacillus Calmette-Guérin, is a vaccine used primarily to protect against tuberculosis, especially severe childhood forms. It is not the vaccine for whooping cough or smallpox.

325. How many teeth does a dog have?

• A. 42
• B. 45
• C. 46
• D. 47

Explanation: A typical adult dog has 42 permanent teeth: 12 incisors, 4 canines, 16 premolars, and 10 molars. Puppies have fewer temporary teeth, so the answer refers to an adult dog.

326. Deficiency of vitamin C will cause:__________?

• A. Beri-Beri
• B. Architis
• C. Scurvy
• D. Night-blindness

Explanation: Vitamin C is needed for collagen formation and healthy connective tissue; its deficiency causes scurvy. Beri-beri results from vitamin B1 deficiency, while night-blindness is linked to vitamin A deficiency.

327. The tread mills training is prescribed for the injured athlete for the purpose of improving his/her_________?

• A. Muscle strength
• B. Stability of the body
• C. Range of motion
• D. Muscle endurance

Explanation: Regular treadmill training mainly develops cardiovascular and muscle endurance because the muscles work continuously over an extended period. Strength, stability, and range of motion require more specific exercises.

328. To which of the following chambers of the heart, is the aorta connected?

• A. Left ventricle
• B. Right ventricle
• C. Right auricle
• D. Left auricle

Explanation: The aorta leaves the left ventricle and carries oxygen-rich blood to the body. The right ventricle instead pumps deoxygenated blood toward the lungs through the pulmonary artery.

329. Blood is cleaned by __________?

• A. Lungs
• B. Liver
• C. Heart
• D. Kidneys

Explanation: The kidneys clean the blood by filtering wastes, excess salts, and water to form urine. The liver also detoxifies substances, but routine filtration of blood is chiefly a kidney function.

330. Vitamins were discovered by__________?

• A. Moesley
• B. Chadwick
• C. Frank Whittle
• D. Casimir Funk

Explanation: Casimir Funk isolated a substance associated with vitamin B1 and introduced the term “vitamine,” later shortened to “vitamin.” The other names are associated with nuclear science or aviation, not vitamin discovery.