Free Human Body and Health MCQs with Answers

451. Who is considered the "father of psychoanalysis?

• A. Sigmund Frend
• B. Galileo
• C. Aristotle
• D. Fabrica

Explanation: Sigmund Freud is called the father of psychoanalysis, a method focused on unconscious motives and mental processes. Galileo and Aristotle were major thinkers but are not founders of psychoanalysis.

452. 'Satiety' is the condition in which patient lacks?

• A. Talk
• B. Eat
• C. Sleep
• D. Walk

Explanation: Satiety is the feeling of fullness after eating, so a satiated person lacks the desire or appetite to eat more. It is the opposite of hunger.

453. Scientific Name of Human is____________?

• A. Homo sapiens
• B. Mono sapiens
• C. Bio sapiens
• D. Cosmopolitan

Explanation: The scientific name of modern humans is Homo sapiens, meaning wise human. Homo is the genus and sapiens is the species name.

454. The brain of human adult weighs about_________?

• A. 1200 - 1300 gm
• B. 1600 - 2000 gm
• C. 500 - 800 gm
• D. 100 - 200 gm

Explanation: An adult human brain weighs about 1.2 to 1.4 kilograms, although the exact value varies with sex and body size. Therefore, 1200-1300 grams is the closest listed range.

455. What happens to a person who receives the wrong type of blood?

• A. All the arteries constrict
• B. All the arteries dialates
• C. The RBCs agglutinate
• D. The spleen and lymphnodes deteriorate

Explanation: Antibodies in incompatible blood react with antigens on the transfused red blood cells, causing the cells to clump, or agglutinate, and possibly rupture. This can block small blood vessels and cause a dangerous transfusion reaction.

456. EEG records the activity of__________?

• A. Heart
• B. Lungs
• C. Brain
• D. Muscles

Explanation: An electroencephalogram, or EEG, detects the brain's electrical activity through electrodes placed on the scalp. Heart activity is recorded by an ECG, not an EEG.

457. The toxicity of which of the following heavy metals leads to Liver cirrhosis?

• A. Copper
• B. Lead
• C. Mercury
• D. Zinc

Explanation: Excess copper accumulates in the liver in Wilson disease and can cause liver damage and cirrhosis. Lead and mercury are also toxic, but copper is the intended metal associated with this condition.

458. Insufficient blood supply in human body is referred as___________?

• A. Ischemia
• B. Hyperemia
• C. Hemostasia
• D. Hemorrhage

Explanation: Ischemia means inadequate blood supply to a tissue, usually because of narrowed or blocked blood vessels. Hemorrhage is blood loss, whereas hyperemia means increased blood flow.

459. Cell or Tissue death within a living body is called as__________?

• A. Neutrophilia
• B. Nephrosis
• C. Necrosis
• D. Neoplasia

Explanation: Necrosis is the death of cells or tissue within a living body, usually because of injury, infection, or loss of blood supply. Neoplasia means abnormal new tissue growth, not tissue death.

460. The carbon dioxide content in the air that we exhale is about?

• A. 4%
• B. 9%
• C. 15%
• D. 16%Chemistry

Explanation: Exhaled air contains about 4% carbon dioxide because body cells produce CO2 during respiration and the blood carries it to the lungs. Inhaled air contains only about 0.04% CO2, so exhalation greatly increases its proportion.