Free Human Body and Health MCQs with Answers

61. Tibia is a bone found in the ____________?

• A. Skull
• B. Arm
• C. Leg
• D. Face

Explanation: The tibia is the shinbone, located in the lower leg between the knee and ankle. It is the larger, weight-bearing bone of the lower leg, alongside the fibula.

62. The largest part of the human brain is ___________?

• A. Medulla oblongata
• B. Cerebellum
• C. Cerebrum
• D. None of these

Explanation: The cerebrum is the largest brain region and is responsible for conscious thought, memory, sensation, and voluntary movement. The cerebellum mainly coordinates movement, while the medulla controls vital involuntary functions.

63. How many bones are there in an adult human being?

• A. 210
• B. 260
• C. 206
• D. 300

Explanation: The standard adult human skeleton contains 206 bones. The higher counts in the other options reflect neither the accepted adult total nor a normal anatomical variation.

64. Red blood corpuscles are formed in the____________?

• A. Liver
• B. Bone marrow
• C. Kidneys
• D. Heart

Explanation: In adults, red blood cells are produced mainly in the red bone marrow through erythropoiesis. The kidneys release erythropoietin, a hormone that stimulates this production, but they do not form the cells themselves.

65. Total volume of blood in a normal adult human being is

• A. 5-6 liters
• B. 3-4 liters
• C. 8-10 liters
• D. 10-12 liters

Explanation: An average adult has roughly 5 to 6 litres of blood, equal to about 7 to 8 percent of body weight. The exact volume varies with body size, sex, and health.

66. Which of the following helps in clotting of blood?

• A. Vitamin B1
• B. Vitamin B2
• C. Vitamin D
• D. Vitamin K

Explanation: Vitamin K is required for the liver to produce several clotting factors, so deficiency can lead to prolonged bleeding. Vitamins B1, B2, and D do not have this primary clotting role.

67. What is the body temperature of a normal man?

• A. 81.1 °C
• B. 37.0 °C
• C. 98.6 °C
• D. 21.7 °C

Explanation: Normal core body temperature is approximately 37.0 °C, which is about 98.6 °F. The option showing 98.6 with a Celsius symbol is a unit error, not the standard Celsius answer.

68. In humans , most nutrient molecules are absorbed by the ?

• A. Small intestine
• B. Stomach
• C. Liver
• D. Large intestine
• E. None of these

Explanation: Most digestion products, including glucose, amino acids and fatty acids, pass into the blood or lymph through the small intestine. Its numerous villi provide a very large absorptive surface.

69. Myopia is a defect of Human eye. it can be corrected by using a lens called?

• A. Convex lens
• B. Concave lens
• C. Cylindrical lens
• D. Plano convex lens
• E. None of these

Explanation: In myopia, the eye focuses distant images in front of the retina. A concave lens diverges incoming rays so the eye can focus them on the retina.

70. The temperature of the dead body is_______________?

• A. 0 'C
• B. 37 '
• C. Room Temperature
• D. Temperature of the place where it is kept
• E. None of these

Explanation: After death, the body no longer regulates its temperature and gradually cools toward the surrounding temperature. Thus its temperature ultimately depends on the place where it is kept, although it is not instantly equal to it.