topic 6 immunity Flashcards
1
Q
How are T cells activated?
A
- Macrophage engulfs the bacterium
- Antigens are presented on the MHCs on the surface of the macrophage
-Becomes an APC - T helper cell is activated and divides by mitosis to from active T helper and T memory cells
2
Q
What is a B memory cell?
A
Remain in the blood after primary immune response to allow a faster immune response to the same pathogen in the future
3
Q
What is a B effector cell?
A
Form plasma cells which produce specific antibodies to combat non-self antigens
4
Q
What is the effector stage of the humoral response?
A
- B cells with complimentary receptors bind to the antigens on bacterium and become an APC
- Active T helper binds to B cell APC and produces cytokines
- Cytokines stimulate the B cell to divide by mitosis to form B memory and B effector.
- B effector cells differentiate into plasma cells and these secrete specific antibodies which destroy the pathogen
5
Q
What is a T helper cell
A
Release cytokines which stimulates B cells to divide by mitosis into B memory and B effector
6
Q
What is a T killer cell
A
They bind to and destroy infected cells which display the specific antigen
7
Q
What is a T memory cell
A
Remain in the blood after primary immune response to allow a faster immune response to the same pathogen in the future
8
Q
What is Phagocytosis?
A
