A type of immediately occuring reaction in which antigens combine with antibodies already attached to the surface of mast cells and basophils is called_____________?
Correct answer: A. Type I hypersensitivity
- A. Type I hypersensitivity
- B. Type II hypersensitivity
- C. Type III hypersensitivity
- D. Type IV hypersensitivity
Explanation
Type I hypersensitivity is an immediate, IgE-mediated reaction: antigen cross-links IgE already fixed to mast cells and basophils, causing mediator release. Types II and III involve antibodies against cells or deposited immune complexes, while type IV is T-cell mediated.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Immunology
90 free Immunology MCQs from Microbiology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Microbiology questions like this
Microbiology is on 3 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
ELISA test when compared to western blot technique is______________?
The overall effect of HIV is to gradually impair the immune system by interference with______________?
Normal ratio of CD4 (T4) : CD8 (T8) is_________________?
CD4 count in normal healthy adult is_______________?
A mother donated a kidney to her daughter having chronic renal failure, which kind of graft it represents________________?