ATI RN
Nervous System Questions Questions
Question 1 of 5
Which of the following is a response of the parasympathetic nervous system?
Correct Answer: C
Rationale: The parasympathetic system (rest-and-digest) increases salivation. Heart rate increase, sweating, and bronchodilation are sympathetic.
Question 2 of 5
In a myelinated axon, where are the action potentials regenerated?
Correct Answer: A
Rationale: Action potentials regenerate at nodes of Ranvier in myelinated axons (saltatory conduction). Axon hillock starts them, terminals end them, myelin insulates.
Question 3 of 5
Schwann cells are responsible for the production of:
Correct Answer: B
Rationale: Schwann cells produce myelin in the PNS, speeding conduction. Neurotransmitters are neuronal, CSF is from choroid plexus, vesicles store neurotransmitters.
Question 4 of 5
In case of peripheral nerve injury, Schwann cells play a role in:
Correct Answer: C
Rationale: Schwann cells promote axon regeneration by clearing debris and forming growth paths. They don’t inhibit or trigger apoptosis.
Question 5 of 5
The refractory period following an action potential is important for:
Correct Answer: C
Rationale: The refractory period (absolute/relative) prevents new action potentials, ensuring unidirectional flow. Pump restores ions, Ca2+ aids release.