ATI RN
Nervous System Questions Questions
Question 1 of 5
There are cranial nerves and spinal nerves.
Correct Answer: B
Rationale: There are 12 pairs of cranial nerves and 31 pairs of spinal nerves (8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal).
Question 2 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 3 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 4 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 5 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.