18 Questions
What is the primary result of an anaphylactic reaction?
Systemic shock and impaired air exchange
What type of hypersensitivity involves IgE antibodies and mast cells?
Type I hypersensitivity
What is the typical time frame for an anaphylactic reaction to occur?
Within 2-30 minutes
What is the role of IgE antibodies in hypersensitive reactions?
To stimulate mast cell degranulation
What is the difference between Type I and Type II hypersensitivities?
Type I involves IgE, while Type II involves IgG and IgM
What is the primary cause of atopy?
Genetic predisposition
What is the result of the activation of complement in Type III Hypersensitivity reactions?
Release of tissue damaging enzymes
What type of diseases are caused by Type III Hypersensitivity reactions?
Vasculitis, glomerulonephritis, and arthritis
What is the role of IgG and IgM in Type III Hypersensitivity reactions?
They bind to antigen and form immune complexes
What is the outcome of the accumulation of immune complexes in host tissues?
Damage to host tissues
What is the characteristic of Chronic Immune Complex disease?
Persistent infection with weak antibody response
How long does it take for Type III Hypersensitivity reactions to occur?
1-3 hours
What is the term for immune system responses that are harmful and produce tissue injury?
Hypersensitivity reactions
What is the term for an overreaction to an antigen that can cause asphyxiation, vomiting, diarrhea, or even death?
Anaphylactic reaction
What is the type of hypersensitivity reaction characterized by a delay in symptoms of several days?
Delayed hypersensitivity
What type of hypersensitivity reaction is triggered by allergens and involves the production of IgE?
Type I hypersensitivity
What is the term for people who have a hereditary predisposition to develop immediate hypersensitivity reactions against common environmental antigens?
Atopic individuals
What is the result of cross-linking of IgE on sensitized cells in a Type I hypersensitivity reaction?
Degranulation and release of vasoactive amines
This quiz covers the basics of allergies and hypersensitivity reactions, including anaphylactic reactions, humoral immunity, and immediate and delayed hypersensitivity. Learn about the immune system responses and their effects on the body.
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