Question

Read the following statements (1 - 4) and select the true (T) and false (F) ones regarding physiological barriers.

• A. 1 - F, 2 - T, 3 - F and 4 - F
• B. 1 - F, 2 - T, 3 - T and 4 - F
• C. 1 - T, 2 - T, 3 - T and 4 - F
• D. 1 - F, 2 - F, 3 - T and 4 - F

Answer 1

The correct option is A 1 - F, 2 - T, 3 - F and 4 - F

Lysozyme present in saliva and tears kills cell wall-based microorganisms by destroying their cell walls, but viruses are devoid of a cell wall.

Acidic pH in the stomach completely destroys bacteria.

An increase in body temperature is a natural defence mechanism to inhibit pathogen growth.

Secretion of oil from the sebaceous gland and sweat from the sudoriferous gland makes the skin surface acidic in nature.