ATI RN
Test Questions on Autonomic Nervous System Questions
Question 1 of 5
Hirschsprung's disease is a disorder in which the large intestine has no nerves and cannot function as it should. This is a problem with which of the following parts of the nervous system?
Correct Answer: D
Rationale: Hirschsprung’s disease involves absent enteric nervous system ganglia in the large intestine, impairing motility. Somatic controls voluntary muscles, sympathetic is ANS, and CNS is brain/spinal cord.
Question 2 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 3 of 5
A bundle of axons in the peripheral nervous system is a:
Correct Answer: B
Rationale: A nerve is a bundle of axons in the PNS (e.g., sciatic nerve). Tracts are CNS, cell bodies are soma, and neuroglia support.
Question 4 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 5 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.