ATI RN
Questions About Nervous System Questions
Question 1 of 5
The midbrain
Correct Answer: D
Rationale: The midbrain contains oculomotor (CN III) nuclei, lying between the pons and diencephalon in the posterior cranial fossa.
Question 2 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 3 of 5
Acetylcholine is a neurotransmitter that provides for communication between muscles and nerves. When there is a problem with the interaction between acetylcholine and the acetylcholine receptor sites on the muscles, which condition(s) can occur?
Correct Answer: D
Rationale: Myasthenia gravis (autoimmune attack on acetylcholine receptors) and botulism (toxin blocks acetylcholine release) both involve acetylcholine dysfunction at the neuromuscular junction. Multiple sclerosis affects CNS myelin, not this interaction, so 'A and B' is correct.
Question 4 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 5 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.