5.4 b-lymphocytes & humoral immunity

Question 1

what does humoral immunity involve?

Answer 1

antibodies

Question 2

what is clonal selection?

Answer 2

process of matching antigens on an antigen-presenting cell with antigen receptors on B & T lymphocytes

Question 3

what do plasma cells do?

Answer 3

secrete antibodies into blood plasma + produce memory cells -> destroy antigen

Question 4

which type of B cells control the primary immune response?

Answer 4

plasma cells

Question 5

what do memory cells do?

Answer 5

circulate in blood & tissue fluid, divide & develop into plasma cells & more memory cells

Question 6

which type of B cells controls the secondary immune response?

Answer 6

memory cells

Question 7

what is different from the primary & secondary immune response?

Answer 7

long-term immunity; antibodies produced at faster rate & increased quantity

Question 8

what is the role of B cells & how are they used? (7)

Answer 8

1) surface antigens are taken in by B cell
2) the cell processes the antigen & present it on its surface
3) helper T cells attach to processed antigens & activates B-cell
4) B-cell divide & give clones of plasma cells by mitosis
5) cloned plasma cells produces & secretes specific antibody that’s complementary to pathogen surface
6) antibodies attach & destroy pathogen
7) B-cells develop into memory cells