Immunity Flashcards
It is the ability of an organism to resist illness whether caused by pathogens or other foreign substances in the body.
Immunity
The body has many defense mechanisms that are categorized into two:
Innate and Adaptive Mechanisms
Act against any type of antigen, they do not have any specificity.
Innate Mechanisms
Act against specific antigens and comprise the humoral and cell-mediated immune response
Adaptive Mechanisms
These are foreign or non-self-substances that trigger an immune response.
Antigens
These are produced by the white blood cells that destroy antigens. These are proteins called immunoglobulins.
Antibodies
This class of antibodies protects the mucosal surfaces of the body from infections.
Immunoglobulin A (IgA)
This class of antibodies act as antigen receptors in mature B cells.
Immunoglobulin D (IgD)
This class of antibodies is an anti-parasite immunity and allergies.
Immunoglobulin E (IgE)
This class of antibodies helps protect the fetus.
Immunoglobulin G (IgG)
This class of antibodies produced when the body is responding to a particular antigen for the first time.
Immunoglobulin M (IgM)
These are organs where white blood cells are produced, stored, or where they mature.
Lymphoid Organs
What are the Primary Lymphoid Organs?
Bone Marrow and Thymus Gland
These cells multiply and mature in the bone marrow
B cells
These cells migrate to the thymus and multiply and mature there.
T cells
This type of T-cell destroy infected cells or malignant cells.
Cytotoxic (Killer) T Cells
This type of T-cell produce chemicals that activate or promote the growth and multiplication of other lymphocytes.
Helper T Cells
This type of T-cell regulates immune response by suppressing the immunity responses of the activated T and B cells.
Suppressor T Cells
What are the Secondary Lymphoid Organs
Lymph Nodes, Spleen, Tonsils, and Lymphoid Tissues (This is where lymphocytes accumulate)
