B LYMPHOCYTES AND HUMORAL IMMUNITY Flashcards Preview

BIOLOGY - CELL STRUCTURE AND DIVISION > B LYMPHOCYTES AND HUMORAL IMMUNITY > Flashcards

Flashcards in B LYMPHOCYTES AND HUMORAL IMMUNITY Deck (23)
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1

How does the antigen enter the B cell

endocytosis

2

What happens after endocytosis

it gets presented on the surfaced (processed), and T-cells bind to the processes antigens & stimulates the B-cell to divide by mitsos

3

What does the division of B-cells produce

plasma cells

4

What do plasma cells produce

a group of antibodies all complementary to a specific foreign antigen

5

Give an example of a pathogen that also causes toxins

cholera

6

What does each toxin molecule also act as

an antigen

7

What are monoclonal antibodies produced by

the clones of B cells (plasma cells)

8

What are monoclonal antibodies

antibodies that target the same antigens

9

What do the cells produced in the clone of B cells become (2 points)

1) plasma cells
2) memory cells

10

What do plasma cells do

secrete antibodies usually into blood plasma

11

How long do plasma cells survive for

for a few days

12

Are B cells present since and what happens when a pathogen is present

birth, they multiply

13

How many antibodies can each plasma cell make every second

2000

14

What do the antibodies secreted by plasma cells do

destroy the antigen

15

What is the production of antibodies and memory cells known as

primary immune response

16

What is the primary immune response

the production of antibodies and memory cells

17

What are memory cells responsible for

secondary immune response

18

How long do memory cells live for

decades

19

Where are memory cells kept

circulating in the blood and tissue fluid

20

What are memory cells for

future infection

21

What do memory cells provide

long-term immunity

22

Describe the role of B cells in the immune response (7 points) - from antigens detected

1) surface of antigens taken up by B-cells
2) B-cells present the antigens on their surface
3) Helper T-cells attach to the processes antigens on B-cells and activates the B-cells
4) B-cell is activated to divide by mitosis to give a clone of plasma cells
5) cloned plasma cells produce and secrete the specific antibody that fits the antigen on pathogens surface
6) antibody attaches to antigen on pathogen and destroys it
7) some B cells develop into memory cells

23

How do memory cells respond to infection

dividing rapidly into plasma cells that produce antibodies