5.3: T lymphocytes and cell-mediated immunity Flashcards
1
Q
Antigens
A
An antigen is any part of an organism or substance that is recognised as non-self (foreign) by the immune system and stimulates an immune response
2
Q
What type of biological molecule are anitgens
A
proteins
3
Q
Where are antigens usually found
A
on cell-surface membranes or cell walls of invading cells
4
Q
What does the presence of an antigen trigger
A
the production of an antibody as part of the body’s defence system
5
Q
Lymphocyte
A
type of white blood cells that are produced by stem cells in bone marrow
6
Q
Two types of lymphocytes
A
B lymphocytes (B cells) T lymphocytes (T cells)
7
Q
B lymphocytes
A
Mature in the bone marrow
8
Q
T lymphocytes
A
Mature in the thymus gland
