Phagocytes

Question 1

Are the nonspecific or specific?

Answer 1

Non specific

Question 2

Where are they in the body?

Answer 2

Travel in the blood but can move out into other tissues

Question 3

What do phagocytes lead to at the site of infection? What does it contain?

Answer 3

Lead to inflammation at the site of infection, the swelling contains dead pathogens and phagocytes (puss)

Question 4

What is inflammation caused by?

Answer 4

Histamine

Causes dilation of the blood vessels. This speeds up the delivery of phagocytes to the site of infection

Question 5

Phagocytosis steps (5)

Answer 5

1. A phagocyte recognises the foreign antigens on a pathogen
2. The cytoplasm of the phagocyte moves round the pathogen engulfing it
3. The pathogen is now contained in a phagocytic vacuole in the cytoplasm of the phagocyte
4. A lysosomes fuses with the phagocytic vacuole. The lysozyme break down the pathogen
5. The phagocyte then present the pathogens antigens