ATI RN
Questions About Nervous System Questions
Question 1 of 5
Which part of a neuron contains the nucleus and most of the cell's organelles?
Correct Answer: D
Rationale: The cell body (soma) contains the nucleus and organelles, integrating signals. Axon conducts, dendrite receives, and axon hillock initiates.
Question 2 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 3 of 5
The small gap between the presynaptic and postsynaptic neurons is known as the:
Correct Answer: B
Rationale: The synaptic cleft is the gap where neurotransmitters diffuse. Vesicles store, transporters reuptake, receptors bind. (Q37 options incomplete, corrected.)
Question 4 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 5 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.