ATI LPN
Medical Surgical Neurology Questions
Question 1 of 5
A 2-year-old girl with fever is hyperventilating. Which of the following is most likely to occur in this girl?
Correct Answer: B
Rationale: Hyperventilation reduces blood CO2, increasing brain pH (alkalosis), which boosts neuronal activity. Reduced CO2 also decreases cerebral blood flow, lowering oxygenation. TMP13 pp. 592, 787
Question 2 of 5
Which of the following is characteristic of the events occurring at an excitatory synapse?
Correct Answer: D
Rationale: At an excitatory synapse, ligand-gated channels open, allowing sodium entry to depolarize the postsynaptic neuron. TMP13 pp. 582-583
Question 3 of 5
The ability to detect two points simultaneously applied to the skin is based on which physiologic mechanism?
Correct Answer: B
Rationale: Lateral inhibition sharpens sensory perception, enabling two-point discrimination. TMP13 p. 603
Question 4 of 5
Which statement concerning the generation of an action potential is correct?
Correct Answer: D
Rationale: An action potential, once initiated, is an all-or-none event that completes its course. TMP13 p. 589
Question 5 of 5
Light entering the eye passes through which retinal layer first?
Correct Answer: D
Rationale: Light first passes through the retinal ganglion layer, the most anterior retinal layer. TMP13 p. 647