ATI RN
Questions About Nervous System Questions
Question 1 of 5
The sensory innervation to the lower part of the medial surface of the auricle is by the
Correct Answer: C
Rationale: The greater auricular nerve (C2-C3, cervical plexus) provides sensory innervation to the lower medial surface of the auricle (ear). The facial nerve (CN VII) is primarily motor, the auriculotemporal nerve (CN V3) supplies the upper lateral auricle, and the lesser occipital nerve (C2) innervates the upper posterior scalp and auricle.
Question 2 of 5
Identify a neuron(s) that have a multipolar structure.
Correct Answer: D
Rationale: Motor neurons and interneurons are typically multipolar (multiple processes). Sensory neurons are usually pseudounipolar.
Question 3 of 5
Which of the following accounts for the movement of neurotransmitters across a synaptic cleft?
Correct Answer: D
Rationale: Neurotransmitters move across the synaptic cleft by diffusion, driven by concentration gradients after release.
Question 4 of 5
Describe the structure of the spinal cord.
Correct Answer: C
Rationale: The spinal cord has gray matter (cell bodies) inside, surrounded by white matter (axons), with dorsal roots carrying sensory fibers.
Question 5 of 5
Which of the following is NOT a lobe of the cerebrum?
Correct Answer: D
Rationale: Cerebellar refers to the cerebellum, not a cerebral lobe. Frontal, parietal, and occipital are cerebrum lobes.