PATHOLOGY

Detailed explanation-1: -The extracellular spaces are protected by the humoral immune response, in which antibodies produced by B cells cause the destruction of extracellular microorganisms and prevent the spread of intracellular infections. The activation of B cells and their differentiation into antibody-secreting plasma cells (Fig.

Detailed explanation-2: -Humoral immunity is an aspect of specific immune responses directed at particular antigens. It takes the form of unique antibodies produced by B lymphocytes that have been specifically selected to neutralize the antigen at hand.

Detailed explanation-3: -Antibody-mediated immunity is also known as humoral immunity because humor refers to the body fluids, generally blood, where the antibodies circulate freely and bind to specific antigens.