immunology Flashcards
1
Q
Describe the classification of hypersensitivity mechanisms.
A
Gel and Coombs classification.
2
Q
How many classes of hypersensitivity reactions are there.
A
4
3
Q
what are the classifications of hypersensitivity reactions.
A
Immediate hypersensitivity.
Direct cell effects.
Immune complex mediated.
Delayed type hypersensitivity.
4
Q
what are antigens that can trigger reactions known as?
A
allergens
5
Q
what can mast cell degranulation be triggered by
A
directly by tissue injury and complement activation and by some bacteria independently of IgE.
