ATI LPN
Neurological Disorders in Medical Surgical Nursing Questions
Question 1 of 5
Interneurons that utilize the neurotransmitter enkephalin to inhibit afferent pain signals are most likely to be found in which region of the central nervous system?
Correct Answer: A
Rationale: Enkephalin-releasing interneurons in the dorsal horn inhibit pain transmission. TMP13 pp. 625-626
Question 2 of 5
Which statement concerning sensory neurons or their functional properties is true?
Correct Answer: B
Rationale: Spatial summation increases signal strength by recruiting more fibers. TMP13 p. 600
Question 3 of 5
Which of the following best describes the 'blind spot' of the eye?
Correct Answer: B
Rationale: The blind spot is the optic nerve exit, lacking photoreceptors, located ~15 degrees lateral to central vision. TMP13 p. 665
Question 4 of 5
Ganglion cells attached to photoreceptors located on the temporal portion of the retina project to which structure?
Correct Answer: B
Rationale: Temporal retina ganglion cells project ipsilaterally to the lateral geniculate nucleus. TMP13 p. 661
Question 5 of 5
Under low or reduced light conditions, which chemical compound is responsible for the inward-directed sodium current in the outer segments of the photoreceptors?
Correct Answer: B
Rationale: In low light, high cGMP levels keep sodium channels open, causing the dark current. TMP13 pp. 650-651