ATI LPN
Medical Surgical Nursing Neurological Disorders Questions
Question 1 of 5
Which part of the neuron conducts electrical impulses away from the cell body?
Correct Answer: A
Rationale: The axon conducts impulses away to other neurons or effectors. Dendrites receive, synapses are gaps. [Level: Knowledge]
Question 2 of 5
The rapid depolarization phase of an action potential is primarily due to:
Correct Answer: B
Rationale: Na+ influx causes depolarization, making the inside positive. [Level: Knowledge]
Question 3 of 5
In an electrical synapse, direct communication between neurons occurs through structures known as:
Correct Answer: B
Rationale: Gap junctions allow direct ion flow in electrical synapses, bypassing chemical steps. [Level: Knowledge]
Question 4 of 5
Nerves that contain both sensory and motor fibers and carry signals in both directions are called:
Correct Answer: C
Rationale: Mixed nerves have both afferent and efferent fibers, common in spinal nerves. [Level: Knowledge]
Question 5 of 5
Astrocytes are essential for:
Correct Answer: D
Rationale: Astrocytes maintain the blood-brain barrier, protecting the CNS. [Level: Knowledge]