Free Human Body and Health MCQs with Answers

11. The Latin word of the name given to a human being Homo Sapiens, include the: __________?

• A. Genus & Family
• B. Family & Order
• C. Genus & Class
• D. Genus & Species

Explanation: In Homo sapiens, Homo is the genus and sapiens is the species. A scientific name normally combines these two ranks, whereas family, order and class are higher taxonomic levels.

12. The Protein coat of virus is known as:

• A. Plasmid
• B. Capsule
• C. Plastid
• D. Capsid

Explanation: A virus’s protein covering is called a capsid, which protects its genetic material and helps determine its shape. A plasmid is a small DNA molecule, not a viral protein coat.

13. Which one of the following is Voluntary Muscle?

• A. Biceps
• B. Cardiac
• C. Stomach
• D. Vessels

Explanation: The biceps is a skeletal muscle that can be consciously contracted, making it voluntary. Cardiac muscle and the smooth muscle of the stomach and blood vessels work involuntarily.

14. Hepatitis is caused by: ____________?

• A. Protozoans
• B. Algae
• C. Fungi
• D. Virus

Explanation: Most forms of infectious hepatitis are caused by hepatitis viruses, such as hepatitis A, B, C, D and E viruses. The disease can also have non-infectious causes, but virus is the intended answer here.

15. Dermatophagia is a ____ condition.

• A. Physiological
• B. Psychological
• C. Dermatological
• D. Genital

Explanation: Dermatophagia is compulsive biting or chewing of the skin, commonly classified as a body-focused repetitive behaviour with a psychological basis. Its name refers to the skin but does not make it primarily a dermatological disease.

16. The largest artery in human body_______?

• A. Subclavian artery
• B. Aorta
• C. Brachial artery
• D. None of these

Explanation: The aorta is the body’s largest artery, carrying oxygenated blood from the left ventricle to the systemic circulation. The subclavian and brachial arteries are smaller branches of this circulation.

17. Deficiency of Vitamin __________ causes Sailors Disease in human?

• A. Vitamin A
• B. Vitamin K
• C. Vitamin C
• D. Vitamin D

Explanation: Vitamin C deficiency causes scurvy, historically called sailors’ disease because sailors on long voyages often lacked fresh fruits and vegetables. Vitamin D deficiency causes rickets, not scurvy.

18. People living in high altitudes (like mountains) usually have a _________?

• A. smaller number of Red Blood Cells
• B. larger number of Red Blood Cells
• C. smaller number of White Blood Cells
• D. larger number of White Blood Cells

Explanation: At high altitude, lower oxygen pressure stimulates the kidneys to release erythropoietin, increasing red blood cell production. The extra red cells help carry more oxygen to tissues.

19. The approximate intensity level of the sound which can cause damage to the ear drum is?

• A. 20 dB
• B. 60 dB
• C. 100 dB
• D. 160 dB

Explanation: Sound around 100 dB can cause pain and possible hearing damage, especially with prolonged exposure, although the exact risk depends on duration and individual susceptibility. Normal conversation is far quieter, around 60 dB.

20. What is the smallest unit of heredity?

• A. Chromosomes
• B. Gene
• C. Nucleotides
• D. none

Explanation: A gene is the basic unit of heredity, consisting of DNA that carries information for a trait or functional product. Chromosomes are larger structures containing many genes.