Free Human Body and Health MCQs with Answers

501. When we sleeps blood pressure_____________?

• A. Increases
• B. Decreases
• C. Remain constant
• D. None of these

Explanation: Blood pressure normally falls during sleep because the autonomic nervous system reduces heart rate and vascular activity. This normal nighttime fall is called the dipping pattern, although some people do not show it.

502. Oncology is the Study of__________?

• A. Onions
• B. Origins
• C. Cancer
• D. Diseases

Explanation: Oncology is the branch of medicine concerned with cancer, including its diagnosis, treatment and prevention. The word is derived from Greek roots referring to a swelling or tumour.

503. What do you understand by disease "Insomnia"?

• A. Color blindness
• B. Depression
• C. Hypertension
• D. Inability to sleep

Explanation: Insomnia is persistent difficulty falling asleep, staying asleep or obtaining restorative sleep. It is not the same as depression, hypertension or colour blindness, although it can occur alongside those conditions.

504. Frog Heart has how many chambers?

• A. 2
• B. 3
• C. 4
• D. 5

Explanation: A frog has a three-chambered heart: two atria and one ventricle. The single ventricle allows some mixing of oxygenated and deoxygenated blood, unlike the four-chambered mammalian heart.

505. Which Part of the Brain Regulates Body Temperature?

• A. cerebellum
• B. cerebrum
• C. hypothalamus
• D. medulla

Explanation: The hypothalamus acts as the body's thermostat by detecting temperature changes and coordinating sweating, shivering, and changes in blood flow. The cerebellum mainly coordinates movement, while the medulla controls vital functions such as breathing and heartbeat.

506. In Eye donation, which part of the eye used?

• A. Retina
• B. Iris
• C. Cornea
• D. Optic nerve

Explanation: The cornea is the transparent front covering of the eye and is the part commonly used in corneal donation and transplantation. The retina, iris, and optic nerve are not routinely transplanted in eye donation.

507. Inhaled air passes through which of the following in the last?

• A. Bronchiole
• B. Larynx
• C. Pharynx
• D. Trachea
• E. None of these

Explanation: Among the listed structures, inhaled air reaches the bronchioles after passing through the pharynx, larynx, and trachea. It then continues into alveoli, but alveoli are not included among the options.

508. The average length of the kidney of a man is about?

• A. 7cm to 8cm
• B. 8cm to 10 cm
• C. 10cm to 13 cm
• D. 13cm to 16cm

Explanation: An adult human kidney is typically about 10 to 12 cm long, so the range of 10 to 13 cm is the appropriate choice. Kidney size varies somewhat with a person's body size and sex.

509. In human osmoregulation takes place by___________?

• A. Liver
• B. Kidney
• C. Spleen
• D. Lungs

Explanation: The kidneys maintain osmotic balance by adjusting how much water and dissolved salts are excreted or retained in urine. This regulation is called osmoregulation.

510. CT Scan stand for__________?

• A. Computed Tomography Scan
• B. Computer Topography Scan
• C. Computed Topography Scan
• D. Computer Tomography Scan

Explanation: CT stands for computed tomography, a technique that uses X-rays and computer processing to produce cross-sectional images of the body. “Topography” and “computer tomography” are incorrect expansions.