cell mediated response

Question 1

what types of cells are involved in cell mediated response

Answer 1

T lymphocytes

Question 2

what do T cells mature ?

Answer 2

thymus

Question 3

is the cell mediated response specific ?

Answer 3

yes

Question 4

what are antigen presenting cells (APC) ?

Answer 4

any cells that present a non self antigen on their surface

Question 5

why is it called cell mediated ?

Answer 5

T cells only respond to antigens which are presented APC cells

Question 6

what is step one of the cell mediated response?

Answer 6

once the pathogen has been engulfed and destroyed by the phagocyte , the antigens will be placed on the cell surface so phagocyte is now a antigen presenting cell

Question 7

what is step 2 of the cell mediated response ?

Answer 7

helper t cells have receptors on their surface that can attach to the antigen presenting cell

Question 8

what is step 3 of the cell mediated response ?

Answer 8

once attached this activates the helper T cells to divide by mitosis to replicate and make large number of clones

Question 9

what is step 4 of the cell mediated response ?

Answer 9

cloned help T cells differentiate into different cells .

Question 10

what can helper T cells differentiate into ?

Answer 10

some remain as T helper cells and activate B lymphocytes.
some stimulate macrophages to perform more phagocytosis
some become memory cells for that shaped antigen
some become cytotoxic killer cells

Question 11

what can cytotoxic T cells destroy ?

Answer 11

abnormal or infected cells

Question 12

how do cytotoxic T cells work ?

Answer 12

produce perforin ,an protein , which makes a pore so any substance can enter or leave a cell.This causes cell death

Question 13

where is a cytotoxic T cell most likley to act ?

Answer 13

most common in viral infects because viruses infect body cells.body cells are sacrificed to prevent viral replication .