ATI RN
Test Questions on Autonomic Nervous System MCAT Questions
Question 1 of 5
Saltatory conduction in myelinated axons involves:
Correct Answer: B
Rationale: Saltatory conduction is impulse 'jumping' between nodes of Ranvier, speeding transmission. Continuous is unmyelinated, slow isn’t typical, bidirectional is rare.
Question 2 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 3 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 4 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.
Question 5 of 5
White matter tracts that connect the cerebral hemispheres and allow communication between them are called:
Correct Answer: C
Rationale: Commissural tracts (e.g., corpus callosum) connect hemispheres. Others serve different roles.