Free Human Body and Health MCQs with Answers

391. What part of the brain controls thirst and hunger?

• A. Thalamus
• B. Hypothalamus
• C. Aymgdala
• D. None

Explanation: The hypothalamus monitors the body's fluid balance and energy needs, triggering thirst and hunger. The thalamus mainly relays sensory signals, while the amygdala is linked to emotion.

392. Which waves are used in sonography?

• A. Ultrasonic waves
• B. Electromagnetic Waves
• C. Fundamentals of waves
• D. Transverse wave

Explanation: Sonography forms images by sending high-frequency sound waves into the body and recording their echoes. These inaudible sound waves are called ultrasonic waves, not electromagnetic waves.

393. Which organ is considered as chemical factory of human body ?

• A. Stomach
• B. Intestine
• C. Liver
• D. Kidneys

Explanation: The liver is called the body's chemical factory because it carries out metabolism, detoxification, bile production and the processing of nutrients and medicines. The stomach and intestines mainly digest and absorb food, while the kidneys chiefly filter blood and form urine.

394. Involuntary muscles in a human body are present in__________?

• A. Brain
• B. Tongue
• C. Digestive system
• D. Limbs

Explanation: The digestive system contains smooth muscle, which contracts automatically to move and mix food. These muscles are involuntary, unlike most muscles of the limbs that can be consciously controlled.

395. Which of the following has not involuntary muscles?

• A. Bigestive System
• B. Blood Vessels
• C. Heart
• D. Brains

Explanation: The brain is nervous tissue and does not contain muscles, whereas the digestive tract, blood vessels and heart contain muscles that work involuntarily. “Bigestive System” is evidently a misspelling of digestive system.

396. The contraction and expansion of the movement of the walls of the food pipe after entering the slightly digested food is known as ______ movement

• A. Gastric
• B. Diastolic
• C. Peristaltic
• D. Oscillatory

Explanation: Peristalsis is the wave-like contraction and relaxation of the alimentary canal that pushes food forward. Gastric refers to the stomach, while diastolic describes the relaxation phase of the heart.

397. A Rhinoscope (or Nasoscope) is a thin, tube-like instrument used to examine the inside of the_____?

• A. Eyes
• B. Nose
• C. Ears
• D. Brains

Explanation: A rhinoscope or nasoscope is inserted to examine the nasal passages, so it is used for the nose. Similar scopes are designed specifically for examining the ears or eyes.

398. What is Melioidosis?

• A. Infectious disease
• B. Loss of memory
• C. Red spot in skin
• D. Pain in joints

Explanation: Melioidosis is an infectious disease caused by the bacterium Burkholderia pseudomallei, commonly found in contaminated soil and water. It can cause fever, pneumonia and other serious infections.

399. The Study of human beauty is called____________?

• A. Oncology
• B. Agrostology
• C. Kalology
• D. Argology

Explanation: Kalology is the study or theory of beauty and aesthetic principles. Oncology concerns tumours, while agrostology is the study of grasses.

400. The photo-receptors in the eye are present in___________?

• A. Cornea
• B. Retina
• C. Iris
• D. Sclera

Explanation: Photoreceptors, namely rods and cones, are light-sensitive cells located in the retina. The cornea and lens focus light, while the iris controls how much light enters.