ATI RN
Questions About the Nervous System Questions
Question 1 of 5
The cranial nerve with the greatest distribution is the:
Correct Answer: B
Rationale: The vagus nerve (X) has the widest distribution, innervating thorax and abdomen. Trigeminal is facial, abducens is eye-specific.
Question 2 of 5
At a synapse, impulse conduction normally:
Correct Answer: B
Rationale: Synaptic transmission is unidirectional (presynaptic to postsynaptic) due to vesicle release and receptor orientation. Neurotransmitters like acetylcholine or epinephrine may be involved but aren’t sole determinants.
Question 3 of 5
During repolarization of the neuronal membrane:
Correct Answer: C
Rationale: Repolarization occurs when potassium (K⁺) exits via voltage-gated channels, restoring the negative interior after Na⁺ influx depolarizes.
Question 4 of 5
An IPSP is believed to cause:
Correct Answer: D
Rationale: An inhibitory postsynaptic potential (IPSP) increases permeability to K⁺ (efflux) and Cl⁻ (influx), hyperpolarizing the membrane to inhibit action potentials.
Question 5 of 5
A client arrives in the emergency department after being in a motor vehicle accident. The client is awake, alert, and fully oriented, but has an elevated blood pressure and pulse as well as a rapid respiratory rate. The nurse is aware that these physiological changes may be a result of:
Correct Answer: B
Rationale: Elevated BP, pulse, and respiration indicate a sympathetic 'fight-or-flight' response to stress/trauma, not spinal compression, CSF leak, or cardiac damage without further evidence.