5.2 Phagocytosis Flashcards
1
Q
What are the two types of white blood cells?
A
- lymphocytes
- phagocytes
2
Q
What is phagocytosis?
A
When large particles, such as bacteria, can be engulfed by cells in vesicles formed from the cell-surface membrane.
3
Q
What are the 5 main stages of phagocytosis?
A
1) phagocyte is attracted and moves to the pathogen by chemical products
2) phagocyte attaches its several cell-surface receptors onto surface of pathogen
3) phagocyte engulfs the pathogen, it is now a phagocyte
4) lysosomes release lysozymes, hydrolyse pathogen (e.g. bacterium)
5) pathogen is broken down and waste products exit cell via exocytosis
4
Q
What is the vesicle called once the phagocyte engulfs the pathogen?
A
Phagosome
