ATI RN
Autonomic Nervous System NCLEX Questions Questions
Question 1 of 5
The following muscles are supplied by posterior rami of spinal nerves EXCEPT
Correct Answer: D
Rationale: Scalene posterior is supplied by anterior rami (cervical plexus). Posterior rami supply deep back muscles like erector spinae.
Question 2 of 5
One of the 31 pairs of nerves that originate on the spinal cord from posterior and anterior roots.
Correct Answer: B
Rationale: Spinal nerves are 31 pairs formed by anterior (motor) and posterior (sensory) roots exiting the spinal cord. Action potentials are signals, Guillain-Barré is a disorder, and nervous system is too broad.
Question 3 of 5
Neuroglial cell of the PNS that forms a myelin sheath around a portion of an axon and participates in axon regeneration after injury.
Correct Answer: C
Rationale: Schwann cells in the PNS myelinate axons and aid regeneration after injury. Wallerian degeneration is a process, neuroblastoma is a tumor, and axosomatic is a synapse type.
Question 4 of 5
Any stress that changes a controlled condition; any change in the internal or external environment that excites a sensory receptor, a neuron, or a muscle fiber.
Correct Answer: D
Rationale: A stimulus is any change (e.g., light, pressure) that activates sensory receptors, neurons, or muscles. Enteric plexuses are digestive nerves, axoplasm is axon cytoplasm, and synaptic cleft is a synapse gap.
Question 5 of 5
An extension of a neuron that conducts a nerve impulse toward a synapse; may be myelinated or unmyelinated.
Correct Answer: A
Rationale: A nerve fiber (axon) conducts impulses toward a synapse. Myelin sheath insulates, axon is a synonym, and effectors are targets.