Free Human Body and Health MCQs with Answers

351. Lock Jaw i.e. difficulty in opening the mouth, is a symptom of___________?

• A. Chlorea
• B. Plague
• C. Diphtheira
• D. Tetanus

Explanation: Tetanus causes painful muscle spasms, including contraction of the jaw muscles known as lockjaw. Diphtheria mainly affects the throat and can form a thick membrane there.

352. Virus is__________?

• A. unicellular
• B. multicellular
• C. acellular
• D. none of these

Explanation: Viruses are acellular because they have no complete cell structure or independent cellular metabolism. They reproduce only inside living host cells.

353. Joint in which bones are joined together by fibrous tissues is called _____________ ?

• A. Fibrous joint
• B. Cartilaginous joint
• C. Synovial joint
• D. Ball and socket joint

Explanation: A fibrous joint connects bones with dense fibrous connective tissue and allows little or no movement, as in skull sutures. Synovial joints have a fluid-filled cavity and permit wide movement.

354. Which part of the body is attacked by "Gingivitis" disease?

• A. Eyes
• B. Nails
• C. Gums
• D. Nostrils

Explanation: Gingivitis is inflammation of the gums, usually caused by plaque buildup around the teeth. It can produce redness, swelling and bleeding during brushing.

355. How many chambers are in the human heart ?

• A. 02
• B. 03
• C. 04
• D. 05

Explanation: The human heart has four chambers: two atria that receive blood and two ventricles that pump it out. This arrangement keeps oxygen-rich and oxygen-poor blood largely separate.

356. In human, Which body part develop first ?

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

Explanation: The heart is the first major organ to form and begin functioning in the developing embryo. It starts beating early, before the brain, lungs and kidneys are fully developed.

357. How many calories are there in 1 gram of carbohydrate?

• A. 2
• B. 2
• C. 4
• D. 10.25

Explanation: Carbohydrates provide about 4 kilocalories per gram when metabolised. The first two options are duplicate entries for 2 and do not affect the unique correct option, c.

358. The expected number of RBCs in a single drop, or microliter, of blood is _________ million in Men.

• A. 4.5 to 6.2 million
• B. 3.4 to 6.8 million
• C. 3.2 to 7.2 million
• D. 4.0 to 5.2 million

Explanation: Adult men commonly have about 4.5–6.2 million red blood cells per microlitre of blood. The range is higher than the usual female range because androgens stimulate red-cell production.

359. The normal range of the number of white blood cells in a microliter of blood is between _________ ?

• A. 2,500 and 09,300
• B. 4,500 and 10,000
• C. 4,900 and 12,000
• D. None of these

Explanation: A normal white-cell count is roughly 4,500–10,000 cells per microlitre. Counts outside this range may indicate infection, inflammation, or another medical condition, though laboratory ranges vary slightly.

360. The expected number of RBCs in a single drop, or microliter, of blood is _________ million in Women.

• A. 4.5 to 6.2 million
• B. 3.4 to 6.8 million
• C. 3.2 to 7.2 million
• D. 4.0 to 5.2 million

Explanation: Adult women commonly have about 4.0–5.2 million red blood cells per microlitre. This is generally lower than the male range because women usually have lower androgen stimulation and periodic blood loss.