What is the function of cerebrospinal fluid (CSF)?
It produces cerebral neurotransmitters.
It acts as a barrier to bacteria.
It acts as an insulator to maintain a constant spinal fluid temperature.
It cushions the brain and spinal cord.
The Correct Answer is D
Choice A rationale
Cerebrospinal fluid (CSF) does not produce cerebral neurotransmitters. Neurotransmitters are produced by neurons in the brain and nervous system.
Choice B rationale
CSF provides a protective barrier to some extent, but its primary function is not to act as a barrier to bacteria. The blood-brain barrier primarily serves this function.
Choice C rationale
CSF helps maintain a stable environment in the central nervous system but is not primarily an insulator for maintaining constant temperature. Its thermal properties are secondary.
Choice D rationale
The primary function of CSF is to cushion and protect the brain and spinal cord from mechanical injury. It also helps maintain the brain's buoyancy and provides a stable environment for the central nervous system.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Encouraging adequate water intake is important for overall health, but it does not directly address the client’s fear of undergoing an EEG. Adequate hydration can ensure better conduction of electrical signals, but it has no bearing on the client's anxiety related to a past electrocution incident. Therefore, it would not be effective in alleviating the client's specific fear regarding the EEG procedure.
Choice B rationale
Distracting the client’s attention from the test may temporarily reduce anxiety, but it does not address the underlying fear. The client’s fear stems from a misunderstanding of the EEG procedure, and distraction will not resolve this. It is more effective to provide factual information to dispel the fear.
Choice C rationale
Informing the client that they will not experience any electrical shock is a crucial step in alleviating their fear. An EEG records brain activity through electrodes placed on the scalp; it does not involve sending electrical currents into the body. Clarifying this fact helps address the root cause of the client’s fear, providing reassurance and reducing anxiety.
Choice D rationale
Informing the client that they will experience only mild electrical shock is incorrect and misleading. An EEG does not deliver any electrical shock to the client. Providing inaccurate information could increase the client’s anxiety and distrust. Proper education about the procedure's safety is essential for alleviating the client’s fear.
Correct Answer is ["C","D"]
Explanation
Choice A rationale
The trigeminal nerve is responsible for facial sensation and motor functions like chewing, not related to gag reflex impairment.
Choice B rationale
The facial nerve controls facial expressions, taste sensations, and other functions but does not influence the gag reflex.
Choice C rationale
The glossopharyngeal nerve (cranial nerve IX) plays a crucial role in the gag reflex as it innervates part of the pharynx and is responsible for sensory functions in the throat.
Choice D rationale
The vagus nerve (cranial nerve X) also contributes to the gag reflex, providing motor innervation to the pharyngeal muscles and aiding in swallowing and speech functions.
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