What is humoral immunity PPT?
Humoral Immunity • Results in production of proteins called “immunoglobulin’s” or “antibodies”. • Body exposed to “foreign” material termed “antigen” which may be harmful to body: virus, bacteria, etc. • Antigen has bypassed other protective mechanisms, ie, first and second line of defense.
What are the steps of the humoral immune response?
Step 1: A macrophage engulfs the pathogen. Step 2: The macrophage then digests the bacterium and presents the pathogen’s antigens. Step 3: A T helper cell binds to the macrophage and becomes an activated T helper cell. Step 4: The activated T helper cell binds to a B cell in order to activate the B cell.
What do you mean by humoral immune response?
[ hyōō′mər-əl ] The immune response involving the transformation of B cells into plasma cells that produce and secrete antibodies to a specific antigen.
What are the types of humoral immunity?
There are two types of humoral immunity: active and passive.
How does humoral immunity differ from cell-mediated immunity?
The major difference between humoral and cell-mediated immunity is that humoral immunity produces antigen-specific antibodies, whereas cell-mediated immunity does not. T lymphocytes, on the other hand, kill infected cells by triggering apoptosis.
What is the role of humoral immunity?
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.
What are the characteristics of humoral immunity?
Humoral immunity refers to antibody production, and all the accessory processes that accompany it: Th2 activation and cytokine production, germinal center formation and isotype switching, affinity maturation and memory cell generation.
What is the main goal of humoral immunity?
The humoral immune system deals with antigens from pathogens that are freely circulating, or outside the infected cells. Antibodies produced by the B cells will bind to antigens, neutralizing them, or causing lysis (dissolution or destruction of cells by a lysin) or phagocytosis.