ATI RN
Nervous System Questions Questions
Question 1 of 5
The point of connection between the ventral and dorsal roots is known as the:
Correct Answer: D
Rationale: The spinal nerve forms where dorsal (sensory) and ventral (motor) roots merge.
Question 2 of 5
The drug ___ blocks the reuptake of serotonin into presynaptic axons.
Correct Answer: A
Rationale: Prozac (fluoxetine), an SSRI, blocks serotonin reuptake, increasing its synaptic presence. Valium/Xanax affect GABA, Deprenyl inhibits MAO.
Question 3 of 5
Which of the following types of cells line the ventricles and spinal cord?
Correct Answer: C
Rationale: Ependymal cells line ventricles and the spinal canal, aiding CSF production/circulation. Astrocytes support, Schwann cells are PNS, oligodendrocytes myelinate.
Question 4 of 5
Which among cranial nerves are mixed nerves that supply parasympathetic to viscera of thorax and abdomen?
Correct Answer: A
Rationale: The vagus nerve (CN X) is a mixed nerve with parasympathetic innervation to thoracic and abdominal viscera. Trigeminal (CN V) is sensory/motor for the face, accessory (CN XI) is motor, and abducens (CN VI) controls eye movement.
Question 5 of 5
A preganglionic fiber entering the sympathetic chain cannot:
Correct Answer: C
Rationale: A preganglionic sympathetic fiber must synapse or pass through; it cannot terminate in the chain without synapsing. Options A, B, and D are possible pathways.