Hypersensitivity

Question 1

what is perenial?

Answer 1

present whole year round e.g dust mite

Question 2

what is anaphylaxis?

Answer 2

dangerous type of allergic reaction which is created by particular foods (nuts);insect bites or medicines.

Question 3

what is hypersensitivity?

Answer 3

exaggerated or inappropriate immune response that leads to damage.

Question 4

what is type I hypersensitivity?

Answer 4

immediate

within minutes of exposure to a variety of enviromental antigens e.g pollen

Question 5

what are phagocytes?

Answer 5

internalise antigens and pathogens and destroy them e.g monocytes and macrophages and polymorphonuclear neutrophils

Question 6

what are the two main lymphocytes

Answer 6

• B-cells and T-cells are both specific recognition of antigen.
• B-cells are for the production of antibodies.

Question 7

what is the role of type 1 T-helper cells?

Answer 7

-activate macrophages

Question 8

what is the role of type 2 T-helper cells?

Answer 8

-help B-cells to divide and differentiate and make antibody.

Question 9

what is the role of cytotoxic T cells?

Answer 9

destroy virally infected cells and tumour cells

Question 10

what is the role of NK cells?

Answer 10

granular lymphocytes with similar properties to cytotoxic T-cells.