2. Cell Recognition And Immune System

Question 1

What are non specific defence mechanisms?

Answer 1

Physical barriers
Phagocytosis

Question 2

What are specific defence mechanisms?

Answer 2

Cell mediated respond (t lymphocytes)
Humoral response (b lymphocytes)

Question 3

What is phagocytosis?

Answer 3

• pathogen enters the body, the phagocyte detects the chemicals and moves towards it
• phagocyte attaches the pathogen to it membrane on its receptors
• phagocyte engulfs pathogen surrounding it with its inner membrane forming a phagosome
• lysosome migrate towards bacterium and release enzymes to digest the bacteria
• products are digested and formed is a phagolysosome