Free Human Body and Health MCQs with Answers

581. The main function of kidney is____________?

• A. to control blood pressure
• B. to control body temperature
• C. to remove waste from blood
• D. to help in digestion of bady

Explanation: Kidneys filter the blood and remove metabolic wastes in the form of urine. They also help regulate blood pressure and fluid balance, but waste removal is their main function.

582. Vertebral Column in human beings consists of how many vertebrae?

• A. 5
• B. 10
• C. 12
• D. 33

Explanation: The vertebral column contains 33 vertebrae in the usual anatomical count, including the fused sacral and coccygeal vertebrae. In adults, these form 26 separate bones because some vertebrae fuse.

583. Orange belongs to the family

• A. Malvaceae
• B. Rutaceae
• C. Composite
• D. None of These

Explanation: Orange is a citrus fruit belonging to the family Rutaceae. Malvaceae includes plants such as cotton and hibiscus, while Composite refers to the daisy family.

584. which one is the most common disease?

• A. Dental
• B. Leprosy
• C. Headache
• D. Migraine

Explanation: Dental caries and other dental diseases are among the most widespread human diseases, so “dental” is the intended choice. Headache is usually a symptom rather than a specific disease, while leprosy and migraine are much less common.