ATI RN
Questions About the Nervous System Questions
Question 1 of 5
Which type of neuron carries signals from sensory receptors to the central nervous system (CNS)?
Correct Answer: C
Rationale: Sensory neurons (afferent) carry signals from receptors to the CNS. Motor neurons (efferent) signal effectors, interneurons connect within CNS, and 'mixed' isn’t a standard type.
Question 2 of 5
The myelin sheath produced by Schwann cells functions to:
Correct Answer: D
Rationale: Myelin increases conduction speed via saltatory conduction. Transmission is axonal, protection partial, and neurotransmitter regulation is synaptic.
Question 3 of 5
During the resting state of a neuron, the membrane is primarily permeable to:
Correct Answer: B
Rationale: At rest (~-70 mV), the membrane is most permeable to potassium (K+) via leak channels, maintaining negative charge inside.
Question 4 of 5
Saltatory conduction occurs in myelinated axons and involves:
Correct Answer: B
Rationale: Saltatory conduction is rapid jumping between nodes, enhancing speed. Continuous is unmyelinated, slow isn’t typical, bidirectional rare.
Question 5 of 5
The layer of connective tissue that surrounds the entire nerve is known as the:
Correct Answer: B
Rationale: The epidural space is outside the meninges, not a nerve layer, but context suggests 'epineurium' (nerve sheath) was intended. (Q75 incomplete, corrected.)