ATI LPN
Medical-Surgical Nursing Neurological System Questions
Question 1 of 5
Which body part is represented superiorly and medically within the postcentral gyrus?
Correct Answer: B
Rationale: The lower limb is represented superiorly and medially in the postcentral gyrus somatosensory map. TMP13 p. 612
Question 2 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 3 of 5
A 60-year-old woman visits the ophthalmologist because of eye pain. Tests show that her right eye has an intraocular pressure of 22 mm Hg and her left eye has an intraocular pressure of 25 mm Hg. Which of the following is the most likely cause of eye pain in this woman?
Correct Answer: C
Rationale: Open-angle glaucoma, with increased trabecular meshwork resistance, raises intraocular pressure, causing pain. TMP13 p. 646
Question 4 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 5 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