Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
13 Cards in this Set
- Front
- Back
Primary Response |
response of body to first contact with antigen |
|
Secondary Response |
(memory response) Response of host upon second exposure to an antigen A more intesive response characterized by high titer of IgG Based on presence of Memory cells |
|
Cytokines |
Signaling molecules |
|
T cells 2 kinds |
Helper T cells (CD4, Th) Cytotoxic T cells (CD8, Tc) |
|
Helper T cells |
prodice cytokines to stimulate Tc sells, activate macrphages, and stimulate B cells |
|
Cytotoxic T cells |
Destroy target cells with perforin |
|
antigen presenting cell (APC) |
ingests, processes and displays antigens on its surface Macrophages and dendritic cells serve as APC Antigens are dislayed in association with a "self" molecule called MHC (major histocompatibility complex) |
|
activated macrophages |
macrophages stimulted by ingesting Ag or by cytokines |
|
Natural killer cells |
lymphocyts that destroy virusinfected cells + tumor cells |
|
interrelationship of cell mediated and humoral immunity |
although considered two seperate branches, the humoral immune system and cell-mediated system funstion in concert T cells help stimulate B cells to produce Ab antibody-dependent Cell-Mediated Cytotoxicity(ADCC) |
|
what is the difference |
i dont know |
|
T dependent antigens |
require a TH cell for antibodies |
|
T independent antigens |
antigens that stimulate B cell directly without help of T cells |