ATI RN
Test Questions on Autonomic Nervous System MCAT Questions
Question 1 of 5
A stimulus will begin an action potential by
Correct Answer: A
Rationale: A stimulus depolarizes the membrane by opening sodium (Na+) channels, allowing Na+ influx to trigger an action potential.
Question 2 of 5
The electrical activity of the brain is recorded in the form of a(n):
Correct Answer: B
Rationale: An electroencephalogram (EEG) records brain electrical activity. An electrocardiogram is for the heart, myelogram images the spinal cord, and neurogram is not standard.
Question 3 of 5
The primary motor area is where commands to begin.
Correct Answer: B
Rationale: The primary motor area (frontal lobe) initiates voluntary skeletal muscle movements, not cardiac or smooth muscle.
Question 4 of 5
Parkinson disease is caused by the destruction of the basal nuclei cells which produce which chemical?
Correct Answer: D
Rationale: Parkinson’s results from loss of dopamine-producing cells in the substantia nigra (part of basal nuclei), affecting movement.
Question 5 of 5
Which of the following is NOT a function of the reticular formation?
Correct Answer: D
Rationale: The reticular formation (brainstem) regulates alertness, sleep-wake cycles, and sensory/motor coordination, but emotion processing is limbic.