ATI RN
Nervous System Multiple Choice Questions and Answers Questions
Question 1 of 5
Which kind of neuroglial cells are not found in the CNS?
Correct Answer: D
Rationale: Satellite cells are found in the peripheral nervous system (PNS), supporting neuron cell bodies in ganglia. All others (astrocytes, ependymal cells, microglia, oligodendrocytes) are CNS glial cells.
Question 2 of 5
The arrival on a given neuron of a series of impulses from a series of terminal axons, resulting in an action potential, is an example of:
Correct Answer: D
Rationale: Spatial summation occurs when multiple presynaptic inputs (from different axons) collectively depolarize a neuron to threshold, triggering an action potential. Temporal summation involves rapid single-source inputs.
Question 3 of 5
The general depolarization toward threshold of a cell membrane when excitatory synaptic activities predominate is known as:
Correct Answer: D
Rationale: Facilitation is the process where excitatory inputs depolarize a neuron toward threshold, enhancing the likelihood of an action potential. ‘Facultation’ is a typo.
Question 4 of 5
A client has been prescribed a drug that is classified as a beta-adrenergic blocker for control of hypertension. Recalling the underlying physiology, the nurse is aware that this drug functions by blocking the action of which neurotransmitter?
Correct Answer: D
Rationale: Beta-adrenergic blockers inhibit norepinephrine (and epinephrine) at beta receptors (e.g., β₁ in heart), reducing BP. Acetylcholine is cholinergic, serotonin/GABA are CNS transmitters.
Question 5 of 5
A client is examined by a nurse who is assessing the client's ability to move the eyes. Which set of cranial nerves will the nurse examine?
Correct Answer: C
Rationale: Eye movement is controlled by CN III (oculomotor), IV (trochlear), and VI (abducens). CN I (olfactory), II (optic), and VII (facial) handle smell, vision, and facial muscles.