The nurse knows that Type 1 Hypersensitivity reactions are caused by which of the following?
Release of memory T-cells
Organ rejection
Damage to blood vessels
Release of histamine
The Correct Answer is D
A. Release of memory T-cells: Memory T-cells are involved in Type IV delayed hypersensitivity, not Type I reactions.
B. Organ rejection: Organ rejection is associated with Type IV hypersensitivity reactions, not Type I.
C. Damage to blood vessels: This is more characteristic of Type III hypersensitivity reactions.
D. Release of histamine: Type I hypersensitivity reactions, such as anaphylaxis and allergic rhinitis, are triggered by the release of histamine from mast cells after IgE-mediated sensitization.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Antihistamines: Antihistamines are the first-line treatment for allergic rhinitis as they block histamine, which is responsible for allergic symptoms such as sneezing, itching, and runny nose.
B. Antibiotics: Antibiotics are used for bacterial infections, not for allergic rhinitis, which is an allergic condition.
C. Antivirals: Antivirals are used for viral infections, not allergic rhinitis.
D. Bronchodilators: Bronchodilators are used for conditions like asthma, not for allergic rhinitis.
Correct Answer is ["A","D","E"]
Explanation
A. Hypotension: A rapid drop in blood pressure is a hallmark symptom of anaphylaxis.
B. Bradycardia: Bradycardia is not a common finding in anaphylaxis. Tachycardia (rapid heart rate) is more typical due to compensatory mechanisms.
C. Hypertension: Anaphylaxis usually causes hypotension due to vascular leakage and vasodilation.
D. Tachycardia: Tachycardia is commonly seen in anaphylaxis as the heart attempts to compensate for the drop in blood pressure.
E. Wheezing: Wheezing is a sign of bronchospasm and respiratory distress, which is a common feature of anaphylaxis.
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