ATI RN
Test Questions on Autonomic Nervous System MCAT Questions
Question 1 of 5
Myasthenia gravis is due to receptors being blocked and destroyed by antibodies.
Correct Answer: C
Rationale: Myasthenia gravis involves antibodies blocking/destroying nicotinic acetylcholine receptors at neuromuscular junctions. Epinephrine is a neurotransmitter, 'transient' is unclear.
Question 2 of 5
Supporting cells located within the CNS are collectively called:
Correct Answer: A
Rationale: Neuroglia (glial cells) support CNS neurons (e.g., astrocytes, oligodendrocytes). Astrocytes are a subtype, perikaryon is the cell body, satellite cells are PNS.
Question 3 of 5
Which of the following manifestations is consistent with a client who sustained a traumatic left parietal lobe injury?
Correct Answer: A
Rationale: Left parietal lobe damage causes Gerstmann’s Syndrome (agraphia, acalculia, agnosia). Memory/vision issues suggest temporal lobe, personality changes suggest frontal lobe, and motor loss suggests frontal/motor cortex damage.
Question 4 of 5
Parasympathetic fibers arise from which set of cranial nerves?
Correct Answer: C
Rationale: Parasympathetic fibers originate from cranial nerves III (oculomotor), VII (facial), IX (glossopharyngeal), and X (vagus), plus sacral S2-S4. Option C matches this.
Question 5 of 5
One reason for the division of the ANS is that:
Correct Answer: D
Rationale: The ANS divides into sympathetic and parasympathetic due to their typically opposing effects (e.g., heart rate up vs. down). Both use two neurons; abdominal organs have dual innervation.