Cell Recognition And Immune System

Question 1

What allows the immune system to identify things?

Answer 1

Each type of cell has specific molecules on its surface identify these molecules include proteins and enable the immune systems to identify things

Question 2

What do the protein molecules enable the immune system to identify

Answer 2

Pathogens
Cells from other organisms of the same species
Abnormal body cells
Toxins

Question 3

Describe non-specific defence mechanism

Answer 3

Response is immediate and the the same for all path

Question 4

Describe specific defence mechanism

Answer 4

Respond to slower and specific to each pathogen

Question 5

Examples of specific and non-specific defence mechanisms

Answer 5

Non-specific
-Physical barrier, e.g. the skin
-phagocytosis

Specific
-Cell mediated response, T lymphocytes
-humoural response, B lymphocytes

Question 6

Define antigen

Answer 6

Proteins on surface of foreign cell

Toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies

Question 7

What protein structure are antigens?

Answer 7

Quaternary structure as it has four polypeptide chains joined together