ATI RN
Questions About Nervous System Questions
Question 1 of 5
The sensory root of the facial nerve
Correct Answer: B
Rationale: The sensory root of CN VII is the nervus intermedius, carrying taste and parasympathetic fibers, exiting via the internal acoustic meatus, not foramen ovale.
Question 2 of 5
Regarding the blood supply of the cerebral cortex
Correct Answer: B
Rationale: The anterior cerebral artery supplies the medial cortex (contralateral leg, micturition/defecation areas). Middle cerebral supplies lateral cortex (arm, face, speech).
Question 3 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 4 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 5 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.