Practice Question
Which rationale explains when allergic rhinitis occurs? (Select all that apply.)
Answer Choices:
Correct Answer:
Histamine is released following allergen exposure.
Rationale:
Histamine is released following allergen exposure.
💎 Allergic rhinitis is an IgE-mediated process where allergen exposure triggers mast cell degranulation.
💎 This releases histamine, which causes sneezing, itching, watery eyes, and increased nasal secretions.
💎 Histamine is the key mediator that produces many classic allergy symptoms.
A person has an initial exposure to an antigen.
💎 The first exposure sensitizes the immune system by producing IgE antibodies against the allergen.
💎 IgE binds to mast cells, preparing the body for a stronger response on re-exposure.
💎 This sensitization step is required before typical allergic rhinitis symptoms occur on later exposure.
Exposure as a result of an allergen produces inflammation.
💎 When the allergen is encountered again, immune mediators trigger localized inflammation in the nasal passages.
💎 This inflammation causes swelling, congestion, and increased mucus production.
💎 The inflammatory response explains why symptoms can persist while exposure continues.
Nasal mucosa become inflamed.
💎 Histamine and other mediators increase capillary permeability, causing mucosal edema and irritation.
💎 Inflamed nasal mucosa leads to congestion, sneezing, and rhinorrhea.
💎 This is a hallmark physical change in allergic rhinitis.
The weather is cold during the winter.
💎 Cold weather can irritate airways, but it is not the mechanism of allergic rhinitis.
💎 Allergic rhinitis is triggered by allergen exposure, not temperature alone.
Want to practice more questions like this?
This question is from ☑️ PN 203 -Quiz #3 Chapters 29-32 which contains 20 questions.
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Question Details
- Category: LPN Nursing Exam(s)
- Subcategory: LPN ATI Exams
- Domain: Medical-Surgical
- Answer Choices: 5