ATI LPN
Neurological Disorders in Medical Surgical Nursing Questions
Question 1 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 2 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 3 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
Question 4 of 5
Which neurotransmitter is released by both rods and cones at their synapses with bipolar cells?
Correct Answer: C
Rationale: Rods and cones release glutamate to synapse with bipolar cells. TMP13 p. 655
Question 5 of 5
The intraocular fluid of the eye flows from the canal of Schlemm into which location?
Correct Answer: B
Rationale: Aqueous humor flows from the canal of Schlemm into aqueous veins. TMP13 p. 645