ATI LPN
Neurological Disorders in Medical Surgical Nursing Questions
Question 1 of 5
Which of the following is a group of neurons in the pain suppression pathway that uses enkephalin as a neurotransmitter?
Correct Answer: C
Rationale: The periaqueductal gray area uses enkephalin in the pain suppression pathway. TMP13 p. 625
Question 2 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 3 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 4 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
Question 5 of 5
For the eye to adapt to intense light, which of the following may occur?
Correct Answer: B
Rationale: Light adaptation reduces rhodopsin and cone pigments to retinal and opsins, lowering sensitivity. TMP13 pp. 652-653