ATI RN
Autonomic Nervous System NCLEX Questions Questions
Question 1 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 2 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 3 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.
Question 4 of 5
The third ventricle is a midline cavity within the diencephalon and is connected to the fourth ventricle by the:
Correct Answer: B
Rationale: The aqueduct of Sylvius links the third and fourth ventricles. Foramen of Monro is lateral-third, canal is spinal, magnum is exit.
Question 5 of 5
The total volume of cerebrospinal fluid in the human central nervous system at any given time is approximately:
Correct Answer: B
Rationale: CSF volume is ~150 mL, with 500 mL produced daily. 50 mL is too low, 1 L excessive.