ATI LPN
Neurological Disorders in Medical Surgical Nursing Questions
Question 1 of 5
The rapid reversal of electrical potential along the membrane of a neuron is called an:
Correct Answer: A
Rationale: An action potential is the rapid depolarization/repolarization during signaling. Resting potential is baseline. [Level: Knowledge]
Question 2 of 5
The undershoot or after-hyperpolarization phase of an action potential is mainly due to:
Correct Answer: B
Rationale: Excess K+ efflux causes temporary hyperpolarization below resting potential. [Level: Knowledge]
Question 3 of 5
In which type of synapse is communication between neurons mediated by neurotransmitters?
Correct Answer: A
Rationale: Chemical synapses use neurotransmitters across a cleft, unlike electrical synapses. [Level: Knowledge]
Question 4 of 5
Which neuroglial cells are responsible for forming the blood-brain barrier and regulating ion concentrations in the extracellular fluid of the brain?
Correct Answer: C
Rationale: Astrocytes form the blood-brain barrier and regulate ions in the CNS. [Level: Knowledge]
Question 5 of 5
The space between the arachnoid mater and the pia mater, containing cerebrospinal fluid, is known as the:
Correct Answer: C
Rationale: The subarachnoid space contains CSF, cushioning the CNS. [Level: Knowledge]