immunity

Question 1

Phagocytosis

Answer 1

Phagocyte recognises foreign antigen on a pathogen.
Cytoplasm of phagocyte engulfs pathogen.
Pathogen is contained in a phagocytic vacuole.
Lysosome fuses with phagocytic vacuole.
Lysosomes contain enzymes lyzozymes which break down pathogen.
Phagocyte presents pathogens antigens - sticks to the antigens on its surface to activate other cells to stimulate an immune response.