ATI RN
Nervous System Questions Questions
Question 1 of 5
The tiny gap between two neurons where communication occurs is known as the:
Correct Answer: A
Rationale: The synapse is the gap where neurotransmitters enable neuron communication. Axon hillock initiates impulses, nodes boost conduction, and ganglia are cell body clusters.
Question 2 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 3 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 4 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.
Question 5 of 5
The reuptake of neurotransmitters back into the presynaptic neuron is facilitated by:
Correct Answer: C
Rationale: Reuptake transporters (e.g., SERT) recycle neurotransmitters into the presynaptic neuron. Vesicles store, junctions conduct, receptors bind.