Cell Mediated Immune Responsee

Question 1

Where are lymphocytes made, where do the diff types mature

Answer 1

Bone marrow
B lymphocytes mature in the bone marrow
T lymphocytes mature in the thymus

Question 2

What are antigen presenting cells

Answer 2

Phagocytes that engulf the virus present some of the pathogens antigens on their own cell membrane

Question 3

Why are there different types of t lymphocytes

Answer 3

Each T cell has a specific receptor on its cell membrane

Question 4

What are the stages of the cell mediated response

Answer 4

• pathogen invades and is destroyed by phagocytosis
• phagocyte becomes apc
• receptors from t lymphocytes bind to specific antigen
• t helper cell is activated
• t helper cell divides rapidly by mitosis forming clones

Question 5

What are the 4 things that the cloned t helper cells do

Answer 5

1: develop into memory cells enabling a rapid response next infection
2: stimulate phagocytes to engulf more pathogens
3: stimulate b lymphocytes to divide and secrete more antibodies
4: activate cytotoxic T cells

Question 6

What are cytotoxic T cells and what do they do

Answer 6

Cytotoxic T cells produce a protein called perforin which makes holes in the cell membrane of target cells, this causes the cell to become freely permeable to substances and ultimately die