Free Human Body and Health MCQs with Answers

571. What is the breathing rate of human being body?

• A. 15-11 minutes
• B. 16-20 minutes
• C. 25-26 minutes
• D. 32-35 minutes

Explanation: A normal resting adult breathing rate is roughly 12 to 20 breaths per minute, making 16 to 20 the matching range. Exercise, illness and age can change the rate considerably.

572. Sunlight is a Great Source of ____________?

• A. vitamin C
• B. vitamin D
• C. vitamin E
• D. vitamin K

Explanation: Sunlight enables the skin to produce vitamin D from a cholesterol-based precursor. Vitamins C, E, and K are obtained mainly through food rather than sunlight.

573. The study of cancer is called_____________?

• A. Zoology
• B. Ecology
• C. Genomic
• D. Oncology

Explanation: Oncology is the branch of medicine concerned with cancers, including their causes, diagnosis, and treatment. Zoology and ecology deal with animals and relationships among organisms, respectively.

574. The human brain uses__________ percent of the total oxygen and blood in the body?

• A. 20
• B. 12
• C. 35
• D. 48

Explanation: Although the brain is only about 2% of body mass, it consumes roughly 20% of the body's oxygen and blood supply at rest. This high demand supports continuous nerve activity.

575. A Little inhalation is done through________?

• A. cigarettes
• B. pipes and cigars
• C. Both A and B offer little inhalation
• D. both offer extreme inhalation

Explanation: Pipe and cigar smokers commonly keep the smoke in the mouth instead of inhaling it deeply into the lungs, unlike typical cigarette smoking. This does not make pipe or cigar smoking safe because the mouth and throat remain exposed to carcinogens.

576. Deficiency of vitamin B1 is causes__________?

• A. Rickets
• B. Bone Infection
• C. Beriberi
• D. Myopia

Explanation: Vitamin B1, or thiamine, deficiency causes beriberi, which can affect the nerves, muscles, and cardiovascular system. Rickets is mainly linked to vitamin D deficiency, not B1 deficiency.

577. The study Of GLANDS is called?

• A. cardiology
• B. None of these
• C. Endocrinology
• D. Entomology

Explanation: Endocrinology studies glands and the hormones they produce, especially the endocrine glands. Cardiology concerns the heart, while entomology concerns insects.

578. How many bones in our body?

• A. 102
• B. 306
• C. 206
• D. 204

Explanation: A typical adult human skeleton contains 206 bones. The number can differ slightly in some people because of fused or extra small bones, but 206 is the standard count.

579. Entomology Is the Study of___________?

• A. worms
• B. insects
• C. Animals
• D. All of these Educational Resources

Explanation: Entomology is the scientific study of insects, which are arthropods with features such as six legs and three main body regions. Worms and animals in general are broader or different study groups.

580. How many numbers of chromosomes in Pea plant?

• A. 12
• B. 14
• C. 46
• D. 48

Explanation: A pea plant has 14 chromosomes in its diploid cells, arranged as seven pairs. This chromosome number was a key part of Mendel’s pea-plant experiments.