ATI RN
Nervous System Multiple Choice Questions and Answers Questions
Question 1 of 5
The rapid reversal of electrical potential along the membrane of a neuron is called:
Correct Answer: A
Rationale: An action potential is the rapid depolarization and repolarization of a neuron’s membrane during impulse transmission. Resting potential is the stable state, others are synaptic effects.
Question 2 of 5
In the peripheral nervous system, Schwann cells wrap around the:
Correct Answer: C
Rationale: Schwann cells wrap around axons in the PNS to form myelin. Axon hillock and cell body are unmyelinated, dendrites rarely myelinated. (Answer corrected from 'nodes' to 'axon' based on context.)
Question 3 of 5
The initial stimulus for an action potential causes a brief influx of:
Correct Answer: A
Rationale: A stimulus opens sodium (Na+) channels, causing Na+ influx to depolarize the membrane and trigger an action potential.
Question 4 of 5
In a chemical synapse, neurotransmitters are stored in:
Correct Answer: C
Rationale: Synaptic vesicles in the axon terminal store neurotransmitters for release. Myelin insulates, hillock initiates, nodes conduct.
Question 5 of 5
The layer of the meninges that is most vulnerable to infection and inflammation is the:
Correct Answer: C
Rationale: The arachnoid mater is vulnerable to inflammation (e.g., meningitis). Pia is deep, dura tough, subarachnoid is a space.