ATI RN
Nervous System Multiple Choice Questions and Answers Questions
Question 1 of 5
The general depolarization toward threshold of a cell membrane when excitatory synaptic activities predominate is known as:
Correct Answer: D
Rationale: Facilitation is the process where excitatory inputs depolarize a neuron toward threshold, enhancing the likelihood of an action potential. ‘Facultation’ is a typo.
Question 2 of 5
A client is examined by a nurse who is assessing the client's ability to move the eyes. Which set of cranial nerves will the nurse examine?
Correct Answer: C
Rationale: Eye movement is controlled by CN III (oculomotor), IV (trochlear), and VI (abducens). CN I (olfactory), II (optic), and VII (facial) handle smell, vision, and facial muscles.
Question 3 of 5
The white matter of the CNS is always:
Correct Answer: C
Rationale: White matter in the CNS consists of myelinated axons organized into tracts that carry signals between regions. It is not always deep to gray matter (e.g., cerebral cortex has superficial gray matter), it is myelinated (not unmyelinated), and it includes both sensory and motor fibers, not just sensory.
Question 4 of 5
Which lobe-function pairing is incorrect?
Correct Answer: A
Rationale: The frontal lobe handles motor functions and planning, not sensory interpretation (done by the parietal lobe’s somatosensory cortex). Parietal does somatesthetic interpretation, occipital manages vision, and temporal handles memory and audition.
Question 5 of 5
Symptoms of irregular body temperature, intense thirst, and the inability to sleep, might indicate that a patient has dysfunctions of the:
Correct Answer: A
Rationale: The hypothalamus regulates body temperature, thirst (via osmoreceptors), and sleep-wake cycles. The pons and medulla handle respiration, the pituitary gland releases hormones, and the cerebrum manages higher functions.