ATI RN
Test Questions on Autonomic Nervous System Questions
Question 1 of 5
The human nervous system is capable of a wide range of functions. What is the basic unit of the nervous system?
Correct Answer: C
Rationale: The neuron is the basic functional unit of the nervous system, responsible for transmitting signals. Glial cells support neurons, meninges protect the CNS, and cerebrospinal fluid cushions it, but only neurons conduct electrical impulses.
Question 2 of 5
Flat neuroglial cell that surrounds cell bodies of peripheral nervous system ganglia to provide structural support and regulate the exchange of material between a neuronal cell body and interstitial fluid.
Correct Answer: B
Rationale: Satellite cells are flat neuroglia that encase PNS ganglion cell bodies, providing support and regulating nutrient exchange. Dendrites are neuron parts, depression is unrelated, and tracts are CNS axon bundles.
Question 3 of 5
Propagation of an action potential (nerve impulse) in a step-by-step depolarization of each adjacent area of an axon membrane.
Correct Answer: A
Rationale: Continuous conduction is the step-by-step depolarization along unmyelinated axons. Epinephrine is a hormone, myelin sheath insulates, and receptors bind neurotransmitters.
Question 4 of 5
The portion of the brain and spinal cord containing neuronal cell bodies, dendrites, and unmyelinated axons.
Correct Answer: A
Rationale: Gray matter consists of neuronal cell bodies, dendrites, and unmyelinated axons in the CNS. White matter is myelinated axons, cerebral cortex is a gray matter region, and synaptic vesicles store neurotransmitters.
Question 5 of 5
An electrical signal that propagates along the membrane of a muscle fiber.
Correct Answer: D
Rationale: A muscle action potential is the electrical signal in muscle fibers, triggering contraction. Interneurons connect neurons, Wallerian degeneration is axon breakdown, and stimulus is an activator.