immune system Flashcards
Bio 3 (6 cards)
1
Q
thymosin
A
A peptide hormone that matures the t cell in the thymus
2
Q
clonal selection
A
When T cells mature, they are naive. When they are exposed to an antigen they can bind quickly to that specific antigen
3
Q
helper T cells
A
🌴secrete lymphokines to coordinate immune response
🌴coordinate & direct other immune cells (like plasma, cyctotoxic T cells & macrophages
🌴lost in HIV
🌴respond to MHC 2
🌴most effective against basteria, fungus, parasites
4
Q
cytotoxic T cells
A
🌴 Kill cells infected by virus by giving by injecting them with toxic chemicals to induce apoptosis
🌴most effective against common infections
5
Q
supressor T cells
A
Tone down immune response after infection is gone
6
Q
self tolerance
A
Turn off lymphocytes that are self-reactive to prevent autoimmune disease
