ATI RN
Nervous System Multiple Choice Questions and Answers Questions
Question 1 of 5
The part of the peripheral nervous system that regulates involuntary responses, such as those of cardiac muscle, smooth muscle, and glands.
Correct Answer: A
Rationale: The autonomic nervous system (ANS) regulates involuntary functions (e.g., heart rate, digestion). Nerve action potential is a signal, astrocytes are glia, and enteric is an ANS subdivision.
Question 2 of 5
One of the two main subdivisions of the autonomic nervous system; prepares the body for intense physical activity.
Correct Answer: A
Rationale: The sympathetic nervous system prepares the body for fight-or-flight (intense activity). Parasympathetic conserves energy, ANS is broader, and enteric controls digestion.
Question 3 of 5
Degeneration of the portion of the axon and myelin sheath of a neuron distal to the site of injury.
Correct Answer: D
Rationale: Wallerian degeneration is the breakdown of the axon and myelin distal to an injury in the PNS. Astrocytes are glia, motor neurons are cells, and action potentials are signals.
Question 4 of 5
The type of circuit in which branches of postsynaptic neurons synapse with earlier neurons in the path.
Correct Answer: C
Rationale: A reverberating circuit involves postsynaptic neurons feeding back to earlier neurons, creating sustained activity. Convergent and divergent describe synapse patterns, and parallel is not standard.
Question 5 of 5
Nerves that directly innervate voluntary muscles are part of the
Correct Answer: B
Rationale: The somatic nervous system innervates voluntary skeletal muscles. Autonomic controls involuntary muscles/glands, CNS is brain/spinal cord, and enteric governs digestion.