ATI LPN
Medical Surgical Neurology Questions
Question 1 of 5
Lobe that contains the primary motor area that enables voluntary control of skeletal muscle movements:
Correct Answer: D
Rationale: The frontal lobe houses the primary motor cortex, controlling voluntary skeletal muscle movements.
Question 2 of 5
What happens in a photoreceptor cell (a rod, for example) in response to a light stimulus?
Correct Answer: C
Rationale: Light reduces cGMP, closing Na⁺ channels, hyperpolarizing photoreceptors by reducing cation influx.
Question 3 of 5
The opening of K+ channels produces a in hair cells because of the concentration of K+ in the endolymph and the endocochlear potential.
Correct Answer: D
Rationale: High K⁺ in endolymph and a positive endocochlear potential (~+80 mV) drive K⁺ influx, depolarizing hair cells when channels open.
Question 4 of 5
You pick up an ice cube. Which aspect of the ice do you notice first and why?
Correct Answer: A
Rationale: Temperature (cold) is sensed first via thin, slower-conducting C-fibers or Aδ fibers, compared to thicker, faster tactile fibers.
Question 5 of 5
A client is admitted to the critical care unit with a subdural hematoma. When assessing the client’s best motor response on GCS, which movement would receive the lowest score?
Correct Answer: A
Rationale: GCS motor: 2 = abnormal extension (A), 3 = decorticate, 4 = withdrawal, 5 = localizing. Lowest score is A.