ATI RN
Nervous System Questions Questions
Question 1 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 2 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 3 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.
Question 4 of 5
Cerebrospinal fluid (CSF) is produced by the choroid plexuses and circulates through the ventricles and the subarachnoid space, providing:
Correct Answer: A
Rationale: CSF cushions and supports the brain. Oxygen is via blood, signals are neuronal, taste is unrelated.
Question 5 of 5
The outer layer of the cerebrum, responsible for higher mental functions and composed of gray matter, is called the:
Correct Answer: A
Rationale: The cerebral cortex (gray matter) manages higher functions. Medulla is inner white matter, nucleus is cell cluster.