Free Human Body and Health MCQs with Answers

361. Main and excessive part of plasma consists of ________?

• A. Carbon dioxide
• B. Oxygen
• C. Water
• D. Glucose

Explanation: Water makes up about 90–92% of blood plasma, while proteins, salts, nutrients, and gases form the smaller remainder. Thus, water is the main component rather than glucose or oxygen.

362. Blood does not coagulate inside the body due to the presence of___________?

• A. Haemoglobin
• B. Fibrin
• C. Heparin
• D. Plasma

Explanation: Heparin is a natural anticoagulant that inhibits clotting reactions within blood vessels. Fibrin, in contrast, is the protein thread that helps form a clot when coagulation occurs.

363. Study of "Aging" is called __________?

• A. Gerontology
• B. Hstologyh
• C. Pysiology
• D. Anthropology

Explanation: Gerontology is the scientific study of ageing and the changes associated with it. Anthropology studies humans and cultures more broadly, while physiology studies normal body functions.

364. The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is ________ ?

• A. Argon
• B. Xenon
• C. Helium
• D. Krypton

Explanation: Helium is mixed with oxygen for deep-sea diving because it is much less soluble in body tissues than nitrogen and reduces nitrogen narcosis and decompression sickness. The other noble gases are unsuitable for this purpose.

365. Stethoscope was invented by _______ ?

• A. Rene Laennec
• B. Steven Sasson
• C. Martin Cooper
• D. Dave Hyatt

Explanation: René Laennec invented the stethoscope in 1816 to listen to sounds produced inside the chest. The other names are associated with unrelated inventions or technologies.

366. The medical branch of science that deals with the study of skin, its functions, diseases, & treatment is ________ ?

• A. Dermatology
• B. Dormatology
• C. Deontology
• D. Dermatoglyphics

Explanation: Dermatology is the medical specialty concerned with the skin, its diseases and their treatment. Deontology concerns professional ethics, while dermatoglyphics studies skin patterns such as fingerprints.

367. The scientific study of fingerprints is called _________ ?

• A. Dactylography
• B. Dactylology
• C. Dactyliology
• D. Dialectology

Explanation: Dactylography is the recording and study of fingerprints for identification. Dialectology studies regional language varieties, not finger patterns.

368. The protein Improtin-11, that was recently identified by scientists, is linked with causing which type of cancer?

• A. Blood Cancer
• B. Colorectal Cancer
• C. Lung Cancer
• D. Prostate Cancer

Explanation: Importin-11, apparently misspelled here as “Improtin-11,” has been associated with colorectal cancer through its role in transporting proteins involved in cell growth. The intended answer is therefore colorectal cancer.

369. The study of X-rays and their medical applications is called _________ ?

• A. Radiology
• B. Raciology
• C. Rheumatology
• D. Rheology

Explanation: Radiology is the medical specialty that uses imaging techniques such as X-rays for diagnosis and treatment guidance. Rheumatology deals with joints and connective-tissue diseases, while rheology studies the flow of matter.

370. What is the Medical term for Fever?

• A. HHypothermia
• B. Pyrexia
• C. Hypertension
• D. Thermophilia

Explanation: Pyrexia is the medical term for fever, meaning an abnormally raised body temperature. Hypothermia is abnormally low body temperature, whereas hypertension means high blood pressure.