ATI RN
Test Questions on Autonomic Nervous System Questions
Question 1 of 5
The nerve that accompanies the submental artery is the
Correct Answer: B
Rationale: The mylohyoid nerve (a branch of the inferior alveolar nerve from CN V3) accompanies the submental artery, supplying the mylohyoid muscle and anterior digastric. The cervical branch of the facial nerve (CN VII) supplies platysma, the transverse cervical nerve (C2-C3) is cutaneous, and the great auricular nerve (C2-C3) innervates the ear.
Question 2 of 5
What mechanism helps keep the neuron membrane at its resting potential?
Correct Answer: B
Rationale: The sodium-potassium pump (active transport) maintains resting potential by pumping 3 Na+ out and 2 K+ in, countering ion leakage.
Question 3 of 5
The protective membranes that enclose the brain and spinal cord are called:
Correct Answer: C
Rationale: Meninges (dura, arachnoid, pia mater) are protective membranes around the brain and spinal cord. CSF cushions, choroid plexus produces CSF, and tracts are axon bundles.
Question 4 of 5
The white matter of the spinal cord
Correct Answer: A
Rationale: White matter contains ascending (sensory) and descending (motor) tracts. Cell bodies and reflex centers are in gray matter.
Question 5 of 5
The primary motor area of the cerebrum is located in the lobe.
Correct Answer: A
Rationale: The primary motor area (precentral gyrus) in the frontal lobe controls voluntary skeletal muscle movement.