Specific Immune Response

Question 1

What is the cell mediated response?

Answer 1

1. Pathogens invade the body cells or are taken up by phagocytosis
2. These cells become antigen presenting cells as they place the pathogen onto their cell surface membrane
3. Receptors on a specific T helper cell fit exactly onto these antigens
   4.this attachment activates the t cell to divide rapidly by mitosis and form clone of genetically identical cells.

Question 2

What are memory cells , B cells and cytotoxic T cells

Answer 2

Memory cells - enable rapid response to future infections by the same pathogen
B cells are stimulated to divide and secrete antibodies
Activate T killer cells - kill abnormal cells and cells that are affected by pathogens by producing a protein called perforin which makes holes in the cell membrane. The cell becomes too permeable and dies as a result

Question 3

What’s clonal selection

Answer 3

Where the t helper cell receptors fit exactly on antigen on the APC

Question 4

What’s clonal expansion

Answer 4

T cells divide rapidly by mitosis and form clone of genetically identical cells