ATI RN
Test Questions on Autonomic Nervous System Questions
Question 1 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 2 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.
Question 3 of 5
Hormone secreted by the adrenal medulla that produces actions similar to those that result from sympathetic stimulation.
Correct Answer: A
Rationale: Epinephrine, secreted by the adrenal medulla, enhances sympathetic responses (e.g., fight-or-flight). Norepinephrine is similar but listed separately, ACh and dopamine are neurotransmitters.
Question 4 of 5
The study of the normal functioning and disorders of the nervous system.
Correct Answer: C
Rationale: Neurology is the study of nervous system function and disorders. Nerve is a structure, oligodendrocytes are glia, and parasympathetic is a system.
Question 5 of 5
Aggregations or bundles of myelinated and unmyelinated axons located in the brain and spinal cord.
Correct Answer: D
Rationale: White matter is bundles of myelinated and unmyelinated axons in the CNS. Wallerian degeneration is axon breakdown, SNS is a system, and spinal nerves are PNS.