Phagocytosis

Question 1

Phagocytes

Answer 1

Specialised white cells that engulf and destroy pathogens

Question 2

2 main types of phagocytes

Answer 2

Macrophages

Neutrophils

Question 3

Pus

Answer 3

Consists of dead neutrophils and macrophages

Question 4

Stages of phagocytosis

Answer 4

1. Pathogens produce chemicals that attract phagocytes
2. Phagocytes recognise non-human proteins on the pathogen
   - this is a response not to a specific type of pathogen but simply a cell or organism that is non self
3. Phagocyte engulfs the pathogen and enclosed it in a vacuole called a phagosome
4. phagosome combines with a lysosome to form a phagolysosome
5. Enzymes from the lysosome digest and destroy the pathogen