ATI LPN
Medical Surgical Neurology Questions
Question 1 of 5
A 39-year-old neurosurgeon picks up a scalpel, which activates numerous sensory receptors in her hand. An increase in which of the following best describes the basis for transduction of the sensory stimuli into nerve impulses?
Correct Answer: D
Rationale: Mechanical stimuli increase ion permeability (usually sodium) in mechanoreceptors, initiating nerve impulses. TMP13 pp. 582-583
Question 2 of 5
The ability to detect two points simultaneously applied to the skin is based on which physiologic mechanism?
Correct Answer: B
Rationale: Lateral inhibition sharpens sensory perception, enabling two-point discrimination. TMP13 p. 603
Question 3 of 5
Which statement concerning the generation of an action potential is correct?
Correct Answer: D
Rationale: An action potential, once initiated, is an all-or-none event that completes its course. TMP13 p. 589
Question 4 of 5
Light entering the eye passes through which retinal layer first?
Correct Answer: D
Rationale: Light first passes through the retinal ganglion layer, the most anterior retinal layer. TMP13 p. 647
Question 5 of 5
Which cell type(s) have action potentials in the retina of the human eye?
Correct Answer: D
Rationale: Only ganglion cells in the retina generate action potentials. TMP13 pp. 655, 656, 658