The nurse is administering diphenhydramine (Benedryl), a neuropharmacologic agent that works by doing what?
Preventing mast cells from releasing histamine
Preventing receptor activation by binding to histamine receptors
Prevent axonal conduction
Promote receptor activation to H1 histamine receptors
The Correct Answer is B
Choice A rationale: Diphenhydramine blocks the action of histamine by binding to H1 receptors, rather than preventing its release from mast cells.
Choice B rationale: Diphenhydramine works by blocking the activation of histamine receptors, preventing the effects of histamine.
Choice C rationale: Diphenhydramine is not involved in preventing axonal conduction.
Choice D rationale: Diphenhydramine is an H1 receptor antagonist and does not promote receptor activation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale: Norepinephrine is a neurotransmitter that is active in both the peripheral and central nervous systems.
Choice B rationale: Serotonin is primarily active in the central nervous system.
Choice C rationale: Substance P is a neurotransmitter that functions more in the peripheral nervous system.
Choice D rationale: Dynorphins primarily function in the central nervous system.
Correct Answer is ["A","C"]
Explanation
Choice A rationale: A history of anaphylactic reaction to a specific vaccine or its components is a contraindication, as it indicates a severe allergic response.
Choice B rationale: A moderate local reaction to a vaccine is not an absolute contraindication. It may be considered when weighing risks and benefits.
Choice C rationale: The presence of moderate or severe illnesses, with or without a fever, is an absolute contraindication, as vaccines may exacerbate existing illness.
Choice D rationale: Current treatment with antimicrobial medication is not an absolute contraindication to vaccination in children.
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