Cell Communication

Question 1

A/Step 1

Answer 1

Pathogen enters and multiplies

Question 2

B/Step 2

Answer 2

Phagocyte eats pathogen and displays antigen on the outside

Question 3

C/Step 3

Answer 3

Helper T cells bind to the antigen on surface of phagocyte. Binding causes cytokine to be released. Cytokine causes cloning of other Helper T cells which chemically alert B and Killer T cells.

Question 4

D

Answer 4

Antibodies bind to pathogens in the bloodstream. B cells continue to secrete more antibodies to neutralize pathogens floating in the blood so they can’t invade body cells

Question 5

E (In your cells)

Answer 5

Body cells that are invaded will display antigens on the surface of the cell. Killer T cells bind to the antigens and lyse (destroy) the cell

Question 6

F

Answer 6

Once the pathogen is elimanated some B and T cells remain in the bloodstream and can be activated if the genetic duplicate returns. These are called memory cells. Suppressor T cells stop the response.