Free Human Body and Health MCQs with Answers

401. The movement of any solvent across a semipermeable membrane is called__________?

• A. Osmosis
• B. Cataphoresis
• C. Electrolysis
• D. Electrophoresis

Explanation: Osmosis is the movement of solvent, usually water, through a semipermeable membrane from a dilute solution toward a more concentrated solution. Electrophoresis and cataphoresis involve movement of charged particles rather than solvent flow.

402. What is the one of the other name of Vitamin "A"?

• A. Riboflavin
• B. Ascorbic Acid
• C. Retinol
• D. Thiamin

Explanation: Retinol is the alcohol form of vitamin A and is important for vision, epithelial tissues, and immune function. Riboflavin is vitamin B2, ascorbic acid is vitamin C, and thiamin is vitamin B1.

403. Which of the following gland has shape of butterfly?

• A. Thyroid gland
• B. Pituitary gland
• C. Adrenal gland
• D. Pineal gland

Explanation: The thyroid gland has two lobes joined by a narrow band, giving it a butterfly-like shape in the neck. The pituitary, adrenal, and pineal glands do not have this characteristic form.

404. Another name of vitamin C is__________?

• A. Ascorbic Acid
• B. Acitic Acid
• C. Citric Acid
• D. Lysozyme

Explanation: Ascorbic acid is the chemical name of vitamin C, a water-soluble antioxidant needed for collagen formation and wound healing. Citric acid is a different acid found commonly in citrus fruits.

405. Who discovered blood circulation?

• A. Carl Linnaeus
• B. Francis Crik
• C. Robert. Brown
• D. William Harvey

Explanation: William Harvey demonstrated that the heart pumps blood through a continuous circuit, establishing the modern understanding of blood circulation. The other names are associated with taxonomy, genetics, or cell biology.

406. Other name of white blood cells is _____________?

• A. Erythrocytes
• B. Leukocytes
• C. Thrombocytes
• D. None of these

Explanation: White blood cells are leukocytes, derived from terms meaning white and cell. Erythrocytes are red blood cells, while thrombocytes are platelets.

407. Other name of platelets _______?

• A. Erythrocytes
• B. Leukocytes
• C. thrombocytes
• D. None of these

Explanation: Platelets are also called thrombocytes and help form blood clots. Leukocytes fight infection, whereas erythrocytes carry oxygen.

408. Other name of red blood cells is ____________?

• A. Erythrocytes
• B. Leukocytes
• C. Thrombocytes
• D. None of these

Explanation: Red blood cells are erythrocytes, whose haemoglobin carries oxygen. Leukocytes are white blood cells and thrombocytes are platelets.

409. Which of the following is a currency of Body cells?

• A. ADP
• B. DNA
• C. RNA
• D. ATP

Explanation: ATP is the cell’s immediate energy currency, because breaking its high-energy phosphate bonds supplies usable energy for cellular work. DNA stores genetic information, while ADP is the lower-energy molecule formed when ATP loses a phosphate.

410. Wisdom teeth normally grow between the age of___________?

• A. 34-40
• B. 17-30
• C. 45-55
• D. 10-17

Explanation: Wisdom teeth, or third molars, usually erupt during late adolescence or early adulthood, commonly between about 17 and 25 years. The 17–30 range is the closest option; eruption can vary and some people never develop them.