Immune System definitions

Question 1

antigen

Answer 1

A complex molecule on the surface of an invading pathogen that triggers an immune
response. It is short for antibody
generator.

Question 2

macrophage

Answer 2

a type of white blood cell that engulfs dead cells, cellular debris, and foreign cells. It presents pathogenic
antigens to T-cells in the immune response

Question 3

T-Cell

Answer 3

a type of white blood cell that matures in the thymus gland. It recognizes and destroys invaders or releases
chemical messengers to co-ordinate the immune
response

Question 4

helper T-cell

Answer 4

co-ordinates the actions of other cells
involved in the immune response. It sends chemical messages to activate the antibody producing B-cells
and killer T-cells

Question 5

B-Cell

Answer 5

a type of white blood cell that produces
antibody molecules when stimulated by helper
T-cells

Question 6

antibody

Answer 6

a protein molecule produced by a B-cell designed to bind to a specific antigen to facilitate its destruction

Question 7

killer t-cell

Answer 7

a type of T-cell that recognizes and
destroys body cells by releasing proteins that
create large holes in the target cell’s membrane

Question 8

memory B-cell and
memory T-cell

Answer 8

specialized white blood
cells that persist in the
bloodstream to provide
future immunity to invaders
bearing a specific antige

Question 9

suppressor t-cell

Answer 9

a type of T-cell that sends
chemical messengers to
stop the immune response
to an antigen