antigens

Question 1

what is an antigen
an antigen is a t…. that injuses an i….. responce in the body. an example of this may be producing anti……

Answer 1

toxin/forgin substence
immune
antibodies

Question 2

how do antigens create an immune responce

Answer 2

through lymphocytes

Question 3

where are antigens found

Answer 3

cell surface membranes

Question 4

what are the two types of antigens

Answer 4

self antigens
non self antigens

Question 5

self antigens
produced by organisms own c….. the immune system
(those that the immune system does not recognise as foreign antigens)
they dont stimulate an i….. r……

Answer 5

cells
immune responce

Question 6

non self antigens
not produced by own c…. (those that the immune system recognises as being foreign eg. the antigens found on pathogenic bacteria and viruses or if a person receives a different blood type during a transfusion)
these stimulte the i….. r…….

Answer 6

cells
immune responce

Question 7

why may the antigens of the surface change frequently

Answer 7

because of genetic mutations

Question 8

why is this a problem
the immune system of many mammal hosts as l………….. and m………. cells produce a spec…. immune response

The surface re…….. on lymphocytes and memory cells are comp……… in shape to only one antigen

When the antigen on a pathogen changes the lym……… and m………. cells can no longer b…

As a result, there is no sec……. immune response

The h…. gets infected and suffers from the disease again

Answer 8

lymphocytes
memory
specific
receptors
complementary
lymphocytes
memory
bind
seccondary
host