ATI RN
Nervous System Questions Questions
Question 1 of 5
What comprises gray matter?
Correct Answer: C
Rationale: Gray matter comprises neuronal cell bodies, dendrites, and unmyelinated axons, forming CNS regions like the cortex. Myelinated axons are white matter.
Question 2 of 5
What are the cells that support and nourish neurons?
Correct Answer: D
Rationale: Neuroglia (e.g., astrocytes, oligodendrocytes) support and nourish neurons. Dendrites and axons are neuron parts, and neurotransmitters are chemicals.
Question 3 of 5
The process of moving sodium ions into the axon to make the inside positive is called
Correct Answer: B
Rationale: Depolarization is Na+ influx making the inside positive, initiating an action potential. Polarization is resting state, repolarization restores it, and hyperpolarization overshoots.
Question 4 of 5
Cerebrospinal fluid is found in which of the following areas?
Correct Answer: D
Rationale: CSF is in brain ventricles, subarachnoid spaces, and the spinal cord’s central canal, circulating to cushion and support the CNS.
Question 5 of 5
Identify the four major regions of the adult brain.
Correct Answer: C
Rationale: The four major brain regions are brain stem, diencephalon (thalamus, hypothalamus), cerebrum, and cerebellum. Spinal cord is separate.