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Untitled Quiz

Created by

@CatchyDahlia

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Questions and Answers

Which hypersensitivity type is characterized by IgE involvement?

Type II hypersensitivity

Type I hypersensitivity (correct)

Type III hypersensitivity

Type IV hypersensitivity

What is the primary mechanism of action in Type II hypersensitivity?

Formation of immune complexes

Activation of mast cells

T cell activation

Complement system activation (correct)

Which type of hypersensitivity is considered delayed?

Type III

Type IV (correct)

Type II

Type I

In Type III hypersensitivity, what leads to tissue damage?

Antigen-antibody complex deposition Signup and view all the answers

Which cells are primarily involved in the response of Type I hypersensitivity?

Mast cells Signup and view all the answers

What type of immunity is associated with Type IV hypersensitivity?

Cellular Signup and view all the answers

What is the response time for Type II hypersensitivity?

15-30 minutes Signup and view all the answers

Which of the following hypersensitivity types does not involve antibodies?

Type IV Signup and view all the answers

Study Notes

Hypersensitivity Types

Hypersensitivity type I is IgE mediated.
Type I response involves mast cells, eosinophils, and basophils.
Type I leads to the release of histamine.
Type II is also known as cytotoxic or cytolytic, caused by antibody-dependent cytotoxicity.
Type II involves complement proteins, ABO and Rh antigens, and antibodies.
Type III is immune complex mediated.
Type III involves complement proteins, macrophages, and neutrophils.
Type IV is cell mediated and is also known as delayed hypersensitivity.
Type IV involves T helper cells, T killer cells, and macrophages.
Type IV is the only hypersensitivity type not involving antibodies.

Hypersensitivity Comparison

Type I is the most rapid response, occurring within 15 to 30 minutes.
Type II and III hypersensitivity also have a rapid response time, in the 15-30 minute range.
Type IV has the slowest response, taking 3 to 10 hours.