A fearful patient has an increased heart rate and blood pressure. The nurse suspects increased activity of which neurotransmitter?
Gamma-aminobutyric acid (GABA)
Norepinephrine
Histamine
Serotonin
The Correct Answer is B
Choice A reason: GABA is an inhibitory neurotransmitter that reduces neuronal activity, promoting calm. In fear, the sympathetic nervous system activates, increasing heart rate and blood pressure, driven by excitatory neurotransmitters, not GABA, which would counteract these effects, making this choice incorrect.
Choice B reason: Norepinephrine, a catecholamine, activates the sympathetic nervous system during fear, increasing heart rate and blood pressure via the fight-or-flight response. Its heightened activity in stress aligns with the patient’s symptoms, making this the correct neurotransmitter choice.
Choice C reason: Histamine regulates arousal and allergic responses but is not primarily responsible for cardiovascular changes in fear. Its role in the brain is less direct than norepinephrine in driving sympathetic activation, making this choice incorrect for the symptoms described.
Choice D reason: Serotonin modulates mood and anxiety but does not directly cause acute cardiovascular changes like increased heart rate and blood pressure in fear. These are driven by norepinephrine’s sympathetic activation, making serotonin an incorrect choice for this scenario.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: HIPAA requires signed patient consent for releasing medical information to third parties, ensuring patient autonomy and confidentiality. This legal standard applies to mental health records, protecting sensitive data, making this the correct choice for information release.
Choice B reason: Verbal consent, even with a guardian, is insufficient under HIPAA, which mandates written authorization for protected health information. This ensures clear documentation, making this choice incorrect, as written consent is the legal standard.
Choice C reason: Psychiatrist approval does not replace patient consent for releasing information. HIPAA prioritizes patient authorization, and provider approval alone violates privacy regulations, making this choice incorrect for legal information release protocols.
Choice D reason: Health care team permission is irrelevant to releasing information, as only the patient’s signed consent is legally required. Team collaboration does not override HIPAA’s patient-centered consent rules, making this choice incorrect.
Correct Answer is D
Explanation
Choice A reason: Mood stabilizers, like lithium, are used for bipolar disorder to regulate mood swings, not for acute anxiety. They target long-term mood stabilization, not immediate symptom relief, which is critical for post-traumatic anxiety, making this category inappropriate for the patient’s condition.
Choice B reason: Antidepressants, such as SSRIs, treat depression and chronic anxiety over weeks, not acute anxiety. Their delayed onset makes them unsuitable for immediate relief following a traumatic event like a car accident, where rapid symptom management is needed, making this choice incorrect.
Choice C reason: Antipsychotics treat psychosis or severe agitation, not primary anxiety. Their use in anxiety is off-label and typically reserved for cases unresponsive to anxiolytics, with higher side effect risks. This makes them inappropriate for acute anxiety management, rendering this choice incorrect.
Choice D reason: Anxiolytics, like benzodiazepines, provide rapid relief for acute anxiety by enhancing GABA activity, calming the central nervous system. They are the primary choice for short-term management of anxiety post-trauma, aligning with clinical guidelines, making this the correct medication category for patient teaching.
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