ATI RN
Test Questions on Autonomic Nervous System MCAT Questions
Question 1 of 5
Which type of neuron is responsible for connecting sensory and motor neurons?
Correct Answer: B
Rationale: Interneurons connect sensory and motor neurons within the CNS. Motor neurons signal effectors, sensory neurons detect stimuli, and 'mixed' isn’t standard. (Q18 incomplete, assumed.)
Question 2 of 5
The undershoot or afterhyperpolarization phase of an action potential is mainly due to:
Correct Answer: B
Rationale: Afterhyperpolarization occurs as K+ continues exiting, overshooting rest potential. Na+ influx stops earlier, Ca2+ is synaptic, Cl- minimal.
Question 3 of 5
In an electrical synapse, direct communication between neurons occurs through structures known as:
Correct Answer: B
Rationale: Gap junctions allow direct ion flow in electrical synapses. Vesicles and neurotransmitters are chemical, myelin insulates.
Question 4 of 5
The paired structures within the lateral ventricles that produce cerebrospinal fluid (CSF) are known as the:
Correct Answer: B
Rationale: Choroid plexuses in ventricles produce CSF. Foramina connect, villi reabsorb, sinuses drain.
Question 5 of 5
The largest part of the human brain responsible for higher cognitive functions, such as thinking and problem-solving, is the:
Correct Answer: D
Rationale: The cerebrum handles higher functions (e.g., thinking). Cerebellum coordinates, brainstem regulates vitals.