ATI LPN
Medical-Surgical Nursing Neurological System Questions
Question 1 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 2 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
Question 3 of 5
A patient arrives in the emergency department with hemiparesis and dysarthria that started 2 hours previously, and health records show a history of several transient ischemic attacks (TIAs). The nurse anticipates preparing the patient for
Correct Answer: D
Rationale: The patient's history and clinical manifestations suggest an acute ischemic stroke, and a patient who is seen within 4.5 hours of stroke onset is likely to receive tPA (after screening with a CT scan). Heparin administration in the emergency phase is not indicated. Emergent carotid transluminal angioplasty or endarterectomy is not indicated for the patient who is having an acute ischemic stroke.
Question 4 of 5
The nurse is caring for a patient who has just returned after having left carotid artery angioplasty and stenting. Which assessment information is of most concern to the nurse?
Correct Answer: B
Rationale: Small emboli can occur during carotid artery angioplasty and stenting, and the aphasia indicates a possible stroke during the procedure. Slightly elevated pulse rate and blood pressure are not unusual because of anxiety associated with the procedure. Fine crackles at the lung bases may indicate atelectasis caused by immobility during the procedure. The nurse should have the patient take some deep breaths.
Question 5 of 5
A 33-year-old female presents with drooping of her eyelid that seem to occur while reading or watching television. This appears to get worse later in the day. She also reports that at times she sees 'double.' A few weeks ago, she was prescribed an antibiotic medication for a urinary tract infection. She does not recall the name of the antibiotic. On physical exam, bilateral ptosis, with the left affected more than the right is seen. Pupillary function intact. A glove is filled with ice, and subsequently applied to the patient's eyelid. After two minutes, the patient's ptosis has improved. Which of the following is most likely to yield rapid symptom improvement?
Correct Answer: C
Rationale: Fatiguable ptosis and diplopia worsening later in the day, with improvement after ice application (reducing acetylcholine breakdown), suggest myasthenia gravis. Acetylcholinesterase inhibitors (e.g., pyridostigmine) provide rapid symptomatic relief by increasing acetylcholine availability at the neuromuscular junction.