ATI RN
Questions About Nervous System Questions
Question 1 of 5
Regarding anterior nerve roots
Correct Answer: B
Rationale: Anterior roots contain efferent motor fibers and some sympathetic fibers (T1-L2), joining posterior roots at the spinal nerve.
Question 2 of 5
The portion of the peripheral nervous system that conveys output to skeletal muscles.
Correct Answer: B
Rationale: The somatic nervous system (SNS) controls voluntary movements by conveying motor signals to skeletal muscles. Microglial cells are CNS glia, effector cells are general targets, and electrical excitability is a property, not a system.
Question 3 of 5
Any disorder that affects the nervous system but particularly a disorder of a cranial or spinal nerve. An example is facial neuropathy (Bell's palsy), a disorder of the facial (VII) nerve.
Correct Answer: D
Rationale: Neuropathy is a disorder affecting nerves, such as Bell’s palsy (facial nerve). Synaptic cleft is a synapse gap, parasympathetic is a system, and ACh is a neurotransmitter.
Question 4 of 5
One of the two main subdivisions of the autonomic nervous system, having cell bodies of preganglionic neurons in the lateral gray columns of the thoracic segment.
Correct Answer: A
Rationale: The sympathetic nervous system, a subdivision of the ANS, has preganglionic neurons in thoracic and lumbar spinal cord, preparing the body for fight-or-flight. Parasympathetic conserves energy, ANS is broader, and enteric plexuses control digestion.
Question 5 of 5
The part of the nervous system that lies outside the central nervous system, consisting of nerves and ganglia.
Correct Answer: D
Rationale: The peripheral nervous system (PNS) includes nerves and ganglia outside the CNS. Neuroblastoma is a tumor, ANS is a PNS subdivision, and action potentials are signals.