Question

In which one of the following options the two examples are correctly matched with their particular type of immunity?

• A. Examples : Polymorphonuclear leukocytes and monocytes, Type of immunity : Cellular barriers
• B. Examples : Anti-tetanus and anti-snake bite injections, Type of immunity : Active immunity
• C. Examples : Saliva in mouth and tears in eyes, Type of immunity : Physical barriers
• D. Examples : Mucus coating of epithelium lining the urinogenital tract and the HCI in stomach, Type of immunity : Physiological barriers

Answer 1

Answer: (A)

Examples : Polymorphonuclear leukocytes and monocytes, Type of immunity : Cellular barriers

Anti-tetanus and anti-snake bite injections provide artificial active immunity.

A physical barrier is the innate immunity refers to the first line of defense against the pathogens.g., skin and not saliva.

Physiological barriers against infection are temperature, pH, CO${}_2$ etc.

The mucous coating is part of the mucosa, associated lymphoid tissue.

Cellular barriers include monocytes, neutrophils (polymorphonuclear cells) which reach the infection site first.

Therefore, the correct answer is option A.