MCQ IN MEDICINE

Detailed explanation-1: -There are two types of leukocytes: phagocytes and lymphocytes. Phagocytes engulf the intruders, break them down and chew them up. Lymphocytes are further broken down into two more types. The B lymphocytes (or B-cells) create antibodies and alert the T lymphocytes (or T-cells) to kill the pathogens.

Detailed explanation-2: -Sometimes a person’s immune system does not work properly. This can result from immune deficiencies present at birth; medications that suppress the immune system, like steroids; unnecessary or overzealous immune responses, such as allergies; or immune responses to one’s self, called autoimmunity.

Detailed explanation-3: -These specialized cells and parts of the immune system offer the body protection against disease. This protection is called immunity. Humans have three types of immunity-innate, adaptive, and passive: Innate immunity: Everyone is born with innate (or natural) immunity, a type of general protection.

Detailed explanation-4: -They neutralize germs, e.g. by directly attaching to the cell surfaces of viruses or bacteria, or by attaching to their toxins. They activate other immune system cells by attaching to their surfaces. They activate proteins that help in the immune system response. 30-Jul-2020