ATI RN
Autonomic Nervous System NCLEX Questions Questions
Question 1 of 5
The three cutaneous nerves that pierce the deep fascia at the middle of the posterior border of the sternocleidomastoid include all the following, EXCEPT the
Correct Answer: D
Rationale: The lesser occipital, greater auricular, and transverse cervical nerves (all from the cervical plexus, C2-C4) pierce the deep fascia at the posterior border of the sternocleidomastoid to supply the neck and scalp. The supraclavicular nerve (C3-C4) emerges lower, near the clavicle, and does not pierce at this midpoint, making it the exception.
Question 2 of 5
Which of the following is NOT true of the resting potential of a neuron?
Correct Answer: C
Rationale: At resting potential (~-70 mV), the inside is negatively charged with abundant potassium (K+), not sodium (Na+), which is outside. The membrane is polarized, and the outside is positive.
Question 3 of 5
What ion is necessary to cause the release of neurotransmitters from the synaptic vesicles?
Correct Answer: B
Rationale: Calcium (Ca2+) influx into the axon terminal triggers neurotransmitter release from synaptic vesicles.
Question 4 of 5
The ventral root of the spinal cord contains fibers and the dorsal root of the spinal cord contains fibers.
Correct Answer: B
Rationale: Ventral roots carry motor (efferent) fibers to muscles; dorsal roots carry sensory (afferent) fibers to the CNS.
Question 5 of 5
A ridge or bump of the cerebral cortex is called a
Correct Answer: B
Rationale: A gyrus is a ridge on the cerebral cortex. Fissures and sulci are grooves, and the insula is a hidden lobe.