KA6- Specific

Question 1

1) Lymphocytes have…15 An antigen is… , often… 20

Answer 1

a single type of receptor binding site for an antigen on a pathogen
a molecule, often a protein located on the surface of cells that trigger for specific immune responses

Question 2

2) Activated B lymphocytes produce… where… 25

Answer 2

a clone of B lymphocytes that secrete antibodies into the blood and lymph where they seek out and destroy their pathogens

Question 3

3) Antibodies are… 18 Antibodies become… , … 8 The resulting… 11

Answer 3

Y-shaped proteins that have receptor binding sites specific to a particular antigen on a pathogen
bound to antigens, inactivating the pathogen
antigen-antibody complex can then be destroyed by phagocytosis

Question 4

4) T lymphocytes destroy… and… 21 Apoptosis is… 6

Answer 4

infected cells by recognising and binding to antigens of the pathogen on the cell membrane and inducing apoptosis
programmed cell death

Question 5

5) T lymphocytes normally… 20

Answer 5

distinguish between self antigens on the body’s own cells and non-self antigens on infected cells

Question 6

6) T lymphocytes attach… 9 These proteins… producing… 23 The remains… 6

Answer 6

onto infected cells and release proteins
diffuse into the infected cells producing self-destructive enzymes contained in lysosomes causing cell death
are destroyed by phagocytosis

Question 7

7) Some of the cloned… 14

Answer 7

B and T lymphocytes survive long term as memory cells

Question 8

8) During secondary exposure, …. 17

Answer 8

production of B-cells are greater and much more rapid than in primary response

Question 9

9) Memory cells destroy… 11

Answer 9

the infected cells before the individual shows symptoms