ATI RN
Questions About the Nervous System Questions
Question 1 of 5
During repolarization of the neuronal membrane:
Correct Answer: C
Rationale: Repolarization occurs when potassium (K⁺) exits via voltage-gated channels, restoring the negative interior after Na⁺ influx depolarizes.
Question 2 of 5
A client arrives in the emergency department after being in a motor vehicle accident. The client is awake, alert, and fully oriented, but has an elevated blood pressure and pulse as well as a rapid respiratory rate. The nurse is aware that these physiological changes may be a result of:
Correct Answer: B
Rationale: Elevated BP, pulse, and respiration indicate a sympathetic 'fight-or-flight' response to stress/trauma, not spinal compression, CSF leak, or cardiac damage without further evidence.
Question 3 of 5
The nurse asks a client to stick out the tongue. The nurse is testing the function of what cranial nerve?
Correct Answer: D
Rationale: CN XII (hypoglossal) controls tongue movement. CN III (oculomotor), VI (abducens), and IX (glossopharyngeal) affect eyes or swallowing/taste, not tongue protrusion.
Question 4 of 5
A client has been prescribed a drug categorized as a sympathomimetic agent, which mimics or imitates sympathetic nervous system activity. What effects would the nurse expect to see in this client based on use of this drug?
Correct Answer: B
Rationale: Sympathomimetics (e.g., norepinephrine mimics) cause pupil dilation (fight-or-flight). BP increases, salivation decreases, pulse quickens.
Question 5 of 5
Which is not a lobe of the cerebrum?
Correct Answer: D
Rationale: The cerebrum has four lobes: frontal, parietal, occipital, and temporal. The insula (insular) is a region within the cortex, not a distinct lobe. 'Sphenoidal' is not a recognized lobe, likely referring to the sphenoid bone, not brain anatomy.