Free Human Body and Health MCQs with Answers

231. Another name for our voice box is _________?

• A. Larynx
• B. Pharynx
• C. Trachea
• D. Mouth

Explanation: The larynx is the voice box because it contains the vocal cords. The pharynx is the throat passage, while the trachea carries air toward the lungs.

232. Fruit plant that flowers only once in lifetime?

• A. Mango
• B. Ground Nut
• C. Banana
• D. Peach

Explanation: Banana is a monocarpic plant, meaning its stem flowers and produces fruit only once before dying, although new shoots can grow from the base. Mango and peach plants flower repeatedly.

233. The process by which kidney stones are crushed with shock waves is called?

• A. Laparoscopy
• B. Dementia
• C. Lithotripsy
• D. None of these

Explanation: Lithotripsy uses focused shock waves to break kidney stones into smaller pieces that can pass through the urinary tract. Laparoscopy is a minimally invasive surgical procedure, not shock-wave treatment.

234. Vegetable crop with rectangular seed is?

• A. Carrot
• B. Onion
• C. Turnip
• D. Cucumber

Explanation: Onion is commonly identified in basic crop-seed classifications as having a relatively angular or rectangular seed. The other listed vegetables have seeds with more rounded, elongated, or flattened shapes.

235. In the medical system of treatment to relieve pains, called Acupuncture?

• A. Drugs are used
• B. Herbs are used
• C. Electric shocks are applied
• D. Fine needles are pricked in the body

Explanation: Acupuncture is performed by inserting fine needles at specific points on the body. It is distinct from treatment based primarily on drugs, herbs, or electric shocks.

236. EEG is used for diagnosing ailments connected with?

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

Explanation: An electroencephalogram records the brain's electrical activity through electrodes placed on the scalp, helping investigate conditions such as epilepsy. Heart activity is assessed with an ECG, not an EEG.

237. A healthy man consumes maximum calories while playing?

• A. Cricket
• B. Golf
• C. Billiards
• D. Football

Explanation: Football generally involves continuous running, sprinting, and movement, so it uses more energy than the mostly stationary activities listed. Actual calorie expenditure still varies with playing time and intensity.

238. Which of following contains cobalt?

• A. Vitamin K
• B. Chlorophyll
• C. Vitamin B12
• D. Haemoglobin

Explanation: Vitamin B12 contains cobalt at the centre of its corrin ring, which is why it is also called cobalamin. Chlorophyll contains magnesium, while haemoglobin contains iron.

239. The most abundant element in human body is __________?

• A. Hydrogen
• B. Blood
• C. Oxygen
• D. Protein

Explanation: Oxygen is the most abundant element in the human body by mass, largely because water and many organic compounds contain oxygen. Blood and protein are substances, not chemical elements.

240. "Plague" is a disease, spread by?

• A. Cow
• B. Cat
• C. Rat
• D. Dog

Explanation: Plague is caused by the bacterium Yersinia pestis and is classically transmitted to humans by fleas carried by infected rats. The rat is therefore the expected source in this question, although fleas are the immediate vectors.