ATI RN
Neurological System Questions Questions
Question 1 of 5
The action potential of a neuron
Correct Answer: B
Rationale: The action potential is initiated by the influx of Na+ through voltage-gated sodium channels, causing depolarization. It is terminated by the efflux of K+ through voltage-gated potassium channels, leading to repolarization. The action potential does not decline in amplitude as it propagates along the axon (all-or-none principle), and there is a net movement of Na+ and K+ across the membrane during the process.
Question 2 of 5
Pupil dilatation occurs with:
Correct Answer: B
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 3 of 5
The following may cause an elevated blood urea:
Correct Answer: D
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 4 of 5
A previously healthy 26-year-old male is brought to the emergency department due to muscle weakness. He reports mild weakness in his legs that has progressively worsened over a few days to the point that he can barely move his legs. He has some numbness in his legs and his arms feel weak. He has recently recovered from a respiratory infection. 1/5 muscle strength is noted throughout the lower extremities, as well as absent patellar and ankle reflexes. 3 to 4-/5 muscle strength is appreciated throughout his upper extremities. A lumbar puncture is performed, which shows the following: Cell count: 4 cells/mm3, Glucose: 67 mg/dL, Protein: 187 mg/dL Gram stain: no organisms Spirometry is performed, which shows a forced vital capacity of 0.85 L. Which of the following is the best next step in management?
Correct Answer: B
Rationale: The patient's presentation of rapidly progressive weakness, areflexia, and elevated cerebrospinal fluid protein with normal cell count (albuminocytologic dissociation) is classic for Guillain-Barre syndrome (GBS). The forced vital capacity of 0.85 L indicates respiratory failure, necessitating immediate intubation to protect the airway and provide mechanical ventilation. Intravenous immunoglobulin and plasma exchange are treatments for GBS but are secondary to securing the airway in this critically ill patient.
Question 5 of 5
The male client diagnosed with multiple sclerosis states he has been investigating alternative therapies to treat his disease. Which intervention is most appropriate by the nurse?
Correct Answer: A
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.