ATI LPN
Medical Surgical Neurology Questions
Question 1 of 5
There are ____ cranial nerves and ___ spinal nerves:
Correct Answer: B
Rationale: 12 pairs of cranial nerves, 31 pairs of spinal nerves (8C, 12T, 5L, 5S, 1Co). [Level: Knowledge]
Question 2 of 5
Which of the following generally acts to conserve energy?
Correct Answer: D
Rationale: Parasympathetic system promotes 'rest and digest,' conserving energy. [Level: Knowledge]
Question 3 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 4 of 5
A 39-year-old neurosurgeon picks up a scalpel, which activates numerous sensory receptors in her hand. An increase in which of the following best describes the basis for transduction of the sensory stimuli into nerve impulses?
Correct Answer: D
Rationale: Mechanical stimuli increase ion permeability (usually sodium) in mechanoreceptors, initiating nerve impulses. TMP13 pp. 582-583
Question 5 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