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: Arranging social services addresses the patient’s eviction, a social determinant of health impacting mental stability. This holistic approach supports recovery by ensuring housing stability, aligning with psychiatric nursing’s focus on comprehensive care, making this the correct choice.
Choice B reason: Contacting the landlord directly exceeds the nurse’s role and may violate privacy. It does not address the patient’s immediate housing needs or mental health, making it less appropriate than coordinating with social services for professional support.
Choice C reason: Questioning the medication reaction’s validity is inappropriate without evidence and distracts from addressing the eviction. It undermines trust and does not support discharge planning, making this choice irrelevant to the patient’s current needs.
Choice D reason: Delaying discharge without clinical justification risks unnecessary hospitalization. The eviction requires social support, not prolonged admission, as mental status improvement is not specified as a concern, making this choice incorrect.
Correct Answer is B
Explanation
Choice A reason: Administering an antipsychotic without a completed care plan risks inappropriate treatment, as the plan outlines specific needs and interventions. This could lead to adverse effects or mismanagement of the patient’s condition, violating evidence-based practice in psychiatric care, making this choice incorrect.
Choice B reason: Completing the care plan promptly ensures individualized, evidence-based interventions, critical for effective psychiatric treatment. It addresses the patient’s specific needs, guides therapy, and ensures safety, aligning with nursing standards and patient-centered care principles, making this the correct choice for prioritization.
Choice C reason: Transferring the patient to another unit does not address the immediate need for a care plan and may disrupt continuity of care. Staffing issues should be managed locally, and transfer is not a primary solution for incomplete planning, making this choice incorrect.
Choice D reason: Documenting staffing issues, while important for administrative purposes, does not directly address the patient’s immediate care needs. A completed care plan is critical for guiding treatment and ensuring safety, making this choice a lower priority compared to completing the plan.
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