What Occurs in an Allergic Reaction When Histamine Binds to Receptors

question 22

Multiple Choice

What occurs in an allergic reaction when histamine binds to receptors on local sensory nerve endings?

• A) Sodium channels are activated, causing pain and swelling.
• B) Itch-specific fibers are stimulated, causing itching and pain.
• C) Vasoconstriction in the local area causes erythema.
• D) Vasoconstriction in the local area causes histaminic cephalgia.

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Definitions:

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