IMMUNOLOGY

Detailed explanation-1: -The germs that enter our bodies will stimulate the lymphocytes in the spleen and lymph nodes. This is an immune reaction which produces immunity with the production of antibodies and cytotoxic T cell. During the immune response, mediators such as cytokines are also produced.

Detailed explanation-2: -Chemotaxis is a mechanism by which bacteria efficiently and rapidly respond to changes in the chemical composition of their environment, approaching chemically favorable environments and avoiding unfavorable ones.

Detailed explanation-3: -Chemotaxis is defined as the unidirectional movement of a cell in response to a chemical gradient in the direction from a low to a high concentration of chemoattractant.

Detailed explanation-4: -Chemotaxis allows a bacterium to adjust its swimming behaviour so that it can sense and migrate toward increasing levels of an attractant chemical or away from a repellent one.

Detailed explanation-5: -Chemotaxis: Chemotaxis is the attraction and movement of macrophages to a chemical signal. Chemotaxis uses cytokines and chemokines to attract macrophages and neutrophils to the site of infection, ensuring that pathogens in the area will be destroyed.