ATI LPN
Medical-Surgical Nursing Neurological System Questions
Question 1 of 5
A 10-year-old boy looks at ants through a magnifying glass. He finds that the ants must be 10 centimeters from the convex lens to be in focus. Which value best describes the refractive power of the lens (in diopters)?
Correct Answer: C
Rationale: Refractive power = 1 / focal length (in meters). Focal length = 10 cm = 0.1 m, so 1 / 0.1 = 10 diopters. TMP13 pp. 637-638
Question 2 of 5
Which of the following best describes when the transmission of sound waves in the cochlea occurs?
Correct Answer: A
Rationale: Sound transmission occurs when the stapes pushes the oval window, displacing fluid and bulging the round window. TMP13 p. 673
Question 3 of 5
After olfactory receptor cells bind odor molecules, a sequence of intracellular events occurs that culminates in the entrance of specific ions that depolarize the olfactory receptor cell. Which ions are involved?
Correct Answer: D
Rationale: Sodium ions enter, depolarizing olfactory receptors due to their high sensitivity. TMP13 p. 690
Question 4 of 5
Which muscle is contracted as part of the pupillary light reflex?
Correct Answer: C
Rationale: The pupillary sphincter contracts to constrict the pupil in the light reflex. TMP13 p. 672
Question 5 of 5
Which structure functions to ensure that each of the three sets of extraocular muscles is reciprocally innervated so that one muscle of the pair relaxes while the other contracts?
Correct Answer: B
Rationale: The medial longitudinal fasciculus coordinates reciprocal extraocular muscle innervation. TMP13 p. 666