Cell recognition and Immune System

Question 1

What’s an Antigen ?

Answer 1

A molecule that triggers an immune response

Question 2

what are the functions of T Lymphocytes ?

Answer 2

• Have cell surface receptors to sense antigens or pathogens
  *Kill infected cells by inducing Apoptosis
• Activates other useful cells when an immune response is triggered

Question 3

What are the functions of Cytotoxic T cells ?

Answer 3

Kill pathogens by releasing Antitoxins

Question 4

What is Phagocytosis ?

Answer 4

The process Where:
* Pseudopodia form from phagocyte and engulf pathogen
* Pathogen is dragged into cell and placed into lysosome
* Enzymes then released into lysosome to digest pathogen

Question 5

What are the functions of B Lymphocytes ?

Answer 5

• Have antigen receptors on their CSM
• Once activated by coming into contact with antigen , splits into a Memory Cell and Plasma Cell

Question 6

What is a memory Cell ?

Answer 6

A cell that remains in the bloodstream and always has a copy of a past infections antibodies prepared

Question 7

What is a plasma cell ?

Answer 7

Produce antibodies for the Antigen the B Lymphocyte came into contact with

Question 8

What’s an Antibody ?

Answer 8

• Proteins produced by plasma cells to bind to and neutralize the harmful substances such as Viruses or Bacteria
  *Bind to another pathogen with second arm eventually forming clump of pathogens that are easier to kill (Agglutination)