ATI RN
Questions About the Nervous System Questions
Question 1 of 5
Which of the following cranial nerves is NOT a sensory nerve?
Correct Answer: B
Rationale: Glossopharyngeal (CN IX) has motor (pharynx) and sensory (taste, throat) roles. Vestibulocochlear (hearing/balance), optic (vision), and olfactory (smell) are sensory only.
Question 2 of 5
Which of the following is NOT true of the parasympathetic nervous system?
Correct Answer: C
Rationale: The parasympathetic system uses acetylcholine only, not norepinephrine (sympathetic). It has long preganglionic and short postganglionic neurons, cranial/sacral origins, and rest-and-digest function.
Question 3 of 5
Which type of neuron carries signals from sensory receptors to the central nervous system (CNS)?
Correct Answer: C
Rationale: Sensory neurons (afferent) carry signals from receptors to the CNS. Motor neurons (efferent) signal effectors, interneurons connect within CNS, and 'mixed' isn’t a standard type.
Question 4 of 5
Clusters of cell bodies in the peripheral nervous system are known as:
Correct Answer: B
Rationale: Ganglia are clusters of cell bodies in the PNS (e.g., dorsal root ganglia). Nuclei are CNS clusters, tracts are axon bundles, and D is incomplete.
Question 5 of 5
The myelin sheath produced by Schwann cells functions to:
Correct Answer: D
Rationale: Myelin increases conduction speed via saltatory conduction. Transmission is axonal, protection partial, and neurotransmitter regulation is synaptic.