A nurse is caring for a client who has a peanut allergy. The client ate peanut butter and is now experiencing anaphylaxis. Which of the following physiological responses should the nurse expect to occur?
Blood pressure increases.
Blood vessels become more permeable.
Blood vessels constrict.
White blood cells are destroyed.
The Correct Answer is B
A. Blood pressure does not increase during anaphylaxis; instead, it typically decreases due to vasodilation and fluid leakage.
B. During anaphylaxis, blood vessels become more permeable, leading to the release of fluids into the tissues, which causes swelling and contributes to hypotension.
C. Blood vessels do not constrict during anaphylaxis; rather, they dilate as a part of the allergic response, resulting in decreased blood pressure.
D. While there is an immune response during anaphylaxis, white blood cells are not destroyed; rather, they are activated to respond to the allergen, leading to inflammation and other systemic effects.
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Correct Answer is A
Explanation
A. Stridor is a high-pitched sound indicating upper airway obstruction and is a critical sign of anaphylaxis requiring immediate intervention to secure the airway.
B. Hypotension is a serious condition that occurs during anaphylaxis, but the priority is to address the airway obstruction first.
C. Urticaria (hives) is a common symptom of an allergic reaction but is not life-threatening and can be addressed after more severe symptoms.
D. Vomiting may occur during anaphylaxis but is not the most urgent finding when airway compromise is present.
Correct Answer is D
Explanation
A. The conversion of RNA into DNA is a critical step in the HIV lifecycle, but it does not directly lead to opportunistic infections; instead, it allows the virus to integrate into the host’s genome.
B. Having reverse transcriptase enzyme is a characteristic of retroviruses like HIV that facilitates replication, but it does not cause opportunistic infections directly.
C. HIV containing a single strand of genetic material is a feature of its classification as a retrovirus but is not related to the risk of opportunistic infections.
D. The ability of HIV to target and destroy CD4 lymphocytes is the key reason for opportunistic infections. CD4 cells are crucial for the immune response, and their depletion leads to immunosuppression, making the client susceptible to infections that would not typically affect an individual with a healthy immune system.