ATI RN
Questions About the Nervous System Questions
Question 1 of 5
The cell bodies of the preganglionic neurons of the sympathetic division are located within the:
Correct Answer: C
Rationale: Sympathetic preganglionic cell bodies are in the lateral horns of thoracic and lumbar (T1-L2) spinal cord gray matter, not cervical/sacral (parasympathetic) or white matter.
Question 2 of 5
Which class of drugs may be used to treat bronchial asthma?
Correct Answer: C
Rationale: Adrenergic drugs (e.g., β₂ agonists like albuterol) dilate bronchi to treat asthma. Cholinergics constrict, anticholinesterases enhance acetylcholine, blockers inhibit dilation.
Question 3 of 5
The cranial nerve with the greatest distribution is the:
Correct Answer: B
Rationale: The vagus nerve (X) has the widest distribution, innervating thorax and abdomen. Trigeminal is facial, abducens is eye-specific.
Question 4 of 5
Which of the following is not a plexus of the spinal nerves?
Correct Answer: C
Rationale: Choroid is not a spinal nerve plexus (it’s a CSF-producing structure). Cervical, sacral, brachial, and lumbar are plexuses.
Question 5 of 5
At a synapse, impulse conduction normally:
Correct Answer: B
Rationale: Synaptic transmission is unidirectional (presynaptic to postsynaptic) due to vesicle release and receptor orientation. Neurotransmitters like acetylcholine or epinephrine may be involved but aren’t sole determinants.