ATI RN
Questions About Nervous System Questions
Question 1 of 5
The rapid depolarization phase of an action potential is primarily due to:
Correct Answer: B
Rationale: Depolarization occurs due to Na+ influx through voltage-gated channels. K+ efflux is repolarization, Ca2+ is synaptic.
Question 2 of 5
The lateral ventricles are located within the cerebral hemispheres and are connected to the third ventricle by the:
Correct Answer: A
Rationale: The interventricular foramen connects lateral ventricles to the third. Aqueduct links third to fourth, canal is spinal, magnum is skull exit.
Question 3 of 5
The normal pressure of cerebrospinal fluid within the subarachnoid space is maintained between:
Correct Answer: B
Rationale: Normal CSF pressure is 10-20 mm Hg in adults (supine). Lower is rare, higher indicates pathology.
Question 4 of 5
Bundle of nerve fibers that transmit information between different regions of the cerebral cortex within the same hemisphere is called a:
Correct Answer: C
Rationale: Association tracts connect cortical regions within one hemisphere. Commissures cross, projection tracts go to/from CNS.
Question 5 of 5
Broca's area, crucial for speech production and language expression, is typically found in the:
Correct Answer: A
Rationale: Broca’s area in the left frontal lobe manages speech production.