ATI LPN
Neurological Disorders in Medical Surgical Nursing Questions
Question 1 of 5
Immediately after an action potential is propagated, which one of the following ions rapidly diffuses out of the cell into the tissue fluid:
Correct Answer: D
Rationale: After depolarization (Na⁺ influx), repolarization occurs as K⁺ diffuses out, restoring the negative resting potential.
Question 2 of 5
Hemorrhage of the main blood vessel which supplies the basal ganglia (e.g. caudate, putamen, and globus pallidus) is likely to involve which other nearby structure:
Correct Answer: D
Rationale: The lenticulostriate arteries supply the basal ganglia and the nearby internal capsule, a white matter tract, making it prone to involvement in hemorrhage.
Question 3 of 5
In what ways are simple and complex cells in the primary visual cortex different?
Correct Answer: A
Rationale: Both are orientation selective; simple cells have distinct ON/OFF regions, complex cells respond to motion across a broader field.
Question 4 of 5
The vestibular-ocular reflex
Correct Answer: B
Rationale: The VOR, driven by semicircular canals (angular motion), stabilizes gaze in darkness, countering head movement.
Question 5 of 5
In sensory pathways, changes in stimulus intensity are signaled by corresponding changes in the
Correct Answer: B
Rationale: Intensity is encoded by the firing rate and number of active neurons, not action potential amplitude (all-or-none).