Immunity

Question 1

How does phagocytosis work

Answer 1

1.phagocyte binds to the antigens on pathogen (non-specific)
2.A vacuole forms around the pathogen
3. Lysosomes within a phagocyte migrate towards the phagosome/vesicle
(Fuse and release enzymes)
4. Pathogens broken down by enzymes
5. Exocytosis of debris/ absorbed by phagocyte
———————–
6. Prevents antigens of pathogen (APC) and binds to T cell
7. Produces more T cells

Question 2

What type of T cells are there?

Answer 2

Active T cells- activate B cells and stimulates phagocytosis

Memory T cells- enables a rapid response when re-exposed to a pathogen

Killer T cells- kills infected body cells

Question 3

What is a monoclonal antibody

Answer 3

Antibodies of a certain shape made by a clone of a single B cell

-pregnancy test and magic bullets

Question 4

What is the cell mediated response

Answer 4

Phagocytosis