ATI RN
Nervous System Questions Questions
Question 1 of 5
The straight sinus is formed by the union of the
Correct Answer: D
Rationale: The straight sinus is formed by the union of the inferior sagittal sinus (along the falx cerebri) and the great cerebral vein (Galen), draining into the confluence of sinuses. The superior sagittal sinus contributes to other sinuses, and the transverse sinus is downstream.
Question 2 of 5
The process of moving sodium ions into the axon to make the inside positive is called
Correct Answer: B
Rationale: Depolarization is Na+ influx making the inside positive, initiating an action potential. Polarization is resting state, repolarization restores it, and hyperpolarization overshoots.
Question 3 of 5
Cerebrospinal fluid is found in which of the following areas?
Correct Answer: D
Rationale: CSF is in brain ventricles, subarachnoid spaces, and the spinal cord’s central canal, circulating to cushion and support the CNS.
Question 4 of 5
Identify the four major regions of the adult brain.
Correct Answer: C
Rationale: The four major brain regions are brain stem, diencephalon (thalamus, hypothalamus), cerebrum, and cerebellum. Spinal cord is separate.
Question 5 of 5
The primary somatosensory area is located in the front of the lobe.
Correct Answer: C
Rationale: The primary somatosensory area (postcentral gyrus) in the parietal lobe processes touch, pressure, and pain.