non-specific cell response

Question 1

what is an antigen

Answer 1

-An antigen is a protein found on the outside of cellls, that triggers an immune response

Question 2

What do antigens enable the immune system to identify

Answer 2

-Pathogens
-Cells from other organisms of same species (e.g transpanded organs)
-Abnormal body cells (cancerous cells)
-Toxins

Question 3

What is phagocytosis

Answer 3

-Cellular process engulfing solid particles using cell membrane carried out by phagocytes

Question 4

Process of phagocytosis

Answer 4

1.Pathogen recognised as having non-self antigens. Pathogen attaches to the phagocyte by surface membrane
2.The pathogen is engulfed by the phagocyte by endocytosis forming a phagosome
3.Lysosome ls fuses to phagosome to form a phagolysosome and release H2O2, HCL and digestive enzymes into phagosome to digest pathogen
4.Harmless products removed by exocytosis or used by phygocyte