Free Human Body and Health MCQs with Answers

381. What animal has longest gestation period of about 640 to 660 days or 95 weeks of any land animal ?

• A. Blue Whale
• B. Elephant
• C. Opossum
• D. None of these

Explanation: The elephant has the longest gestation period among land animals, lasting about 20 to 22 months, or roughly 640 to 660 days. A blue whale is not a land animal, so it does not fit the question’s category.

382. Which of the following is the world's loudest bird ?

• A. White bellbird
• B. Peacock
• C. Piha
• D. None of the above

Explanation: The white bellbird is widely reported as the loudest known bird, with calls measured at about 125 decibels at close range. Peacock and piha calls are loud or distinctive but do not hold this record.

383. Which of the following protects the body against infectious disease and foreign invaders?

• A. Leukocytes
• B. Red blood cells
• C. Endoplasmic reticulum (ER)
• D. Golgi apparatus

Explanation: Leukocytes, or white blood cells, identify and attack pathogens and other foreign materials. Red blood cells mainly transport oxygen, while the endoplasmic reticulum and Golgi apparatus are cell structures rather than immune defenses.

384. What's the Strongest Muscle in the Human Body based on its weight?

• A. Hands
• B. Masseter
• C. Neck
• D. Legs

Explanation: The masseter is commonly described as the strongest muscle relative to its weight because it can exert a very large force while closing the jaw. Claims about the strongest muscle vary with the measurement used, but masseter is the standard answer to this wording.

385. Which of the following is the study of micro- organisms, mostly viruses and single called organisms such as bacteria, yeasts and protozoa ?

• A. Microbiology
• B. Micrology
• C. Histopathology
• D. Tavelogy

Explanation: Microbiology studies microorganisms such as bacteria, yeasts, protozoa and many viruses. Micrology is not the standard name for this biological discipline, and histopathology concerns diseased tissues.

386. "Gastric juice" is a secretion of the glands present in________?

• A. Gall Bladder
• B. Kidneys
• C. Stomach
• D. None of these

Explanation: Gastric juice is produced by glands in the stomach lining and contains hydrochloric acid and digestive enzymes. The gall bladder stores bile, while the kidneys produce urine rather than gastric juice.

387. Hepatitis C is a leading cause of_________?

• A. HIV
• B. Diabetes
• C. Chronic Liver disease
• D. AIDS

Explanation: Hepatitis C virus attacks the liver and can persist for years, causing chronic hepatitis, cirrhosis and liver cancer. It does not cause HIV, diabetes or AIDS.

388. Which of the following is both endocrine and exocrine gland?

• A. thyroid
• B. pancreas
• C. parathyroid
• D. all of these

Explanation: The pancreas has an exocrine role, releasing digestive enzymes through a duct, and an endocrine role, releasing hormones such as insulin into the blood. The thyroid and parathyroid are endocrine glands only.

389. All of the following organs in the human body are located both on the right and the left sides, except;_________?

• A. Lungs
• B. Kidneys
• C. Spleen
• D. Eyes

Explanation: The spleen is normally a single organ on the left side of the upper abdomen. The lungs, kidneys and eyes occur as paired organs on the right and left sides.

390. Birth control pills contain synthetic________?

• A. Sugars
• B. Hormones
• C. Vitamins
• D. Minerals

Explanation: Birth-control pills contain synthetic versions of ovarian hormones, usually oestrogen, progestin or progestogen. These hormones suppress ovulation and make fertilisation less likely.