ATI RN
Nervous System Multiple Choice Questions and Answers Questions
Question 1 of 5
Which types of CNS neuroglia are the most similar in appearance?
Correct Answer: C
Rationale: Astrocytes (star-shaped) and oligodendrocytes (fewer processes) are similar in having branching processes, unlike microglia (small, mobile) or ependymal cells (ciliated, lining ventricles).
Question 2 of 5
An electrical potential difference across the plasma membrane of a neuron is known as a(n)
Correct Answer: C
Rationale: The resting membrane potential (~-70 mV) is the voltage difference across a neuron’s membrane at rest, due to ion gradients. Action and graded potentials are dynamic, and electrochemical is a broader term.
Question 3 of 5
What gives white matter its white color?
Correct Answer: D
Rationale: White matter’s white color comes from myelin, the lipid-rich sheath around axons, reflecting light. Dendrites and cell bodies are gray matter, and Nissl bodies are in cell bodies.
Question 4 of 5
The nucleus of a neuron is associated with the of the neuron.
Correct Answer: B
Rationale: The nucleus resides in the cell body (soma), which integrates signals and maintains neuron function. Axons transmit, dendrites receive, and myelin sheaths insulate.
Question 5 of 5
Identify a classification of neurons by structure.
Correct Answer: C
Rationale: Unipolar neuron is a structural classification (one process). Interneuron, motor, and sensory are functional types.