ATI RN
Autonomic Nervous System NCLEX Questions Questions
Question 1 of 5
The part of the neuron that receives signals from other neurons is called the:
Correct Answer: B
Rationale: Dendrites receive signals from other neurons. Axons transmit, synapses are communication gaps, and myelin insulates.
Question 2 of 5
Multipolar neurons have:
Correct Answer: B
Rationale: Multipolar neurons (e.g., motor neurons) have multiple dendrites and one axon. A is bipolar, C is rare, and D repeats B.
Question 3 of 5
In the central nervous system, the equivalent of Schwann cells are called:
Correct Answer: C
Rationale: Oligodendrocytes myelinate CNS axons, like Schwann cells in PNS. Satellite cells support PNS cell bodies, astrocytes nourish, microglia are immune.
Question 4 of 5
The threshold potential is the membrane potential at which:
Correct Answer: A
Rationale: Threshold (~-55 mV) is the potential where Na+ channels open fully, triggering an action potential. Rest is ~-70 mV, hyperpolarization follows.
Question 5 of 5
Neurotransmitters are released into the synaptic cleft in response to the arrival of:
Correct Answer: A
Rationale: Action potentials trigger Ca2+ influx, releasing neurotransmitters. Resting potential is stable, vesicles contain, nodes conduct.