The accessory nerve XI controls muscles involved i

ATI LPN

ATI LPN Test Bank

The accessory nerve (XI) controls muscles involved in:

A. Facial expression B. Chewing C. Swallowing and head movement D. Eye movement

Correct Answer: C

Rationale: The accessory nerve (CN XI) controls sternocleidomastoid and trapezius for head movement. [Level: Knowledge]

The gaps in between the myelin sheath are called:

A. axon B. cell body C. dendrite D. node of Ranvier

Correct Answer: D

Rationale: Nodes of Ranvier are gaps in myelin where action potentials regenerate. [Level: Knowledge]

Nerve signal transmission over myelinated axons is called:

A. saltatory conduction B. point to point conduction C. synaptic transmission D. dendritic conduction

Correct Answer: A

Rationale: Saltatory conduction jumps between nodes of Ranvier in myelinated axons. [Level: Knowledge]

The cerebral hemispheres are separated by the:

A. corpus callosum B. longitudinal fissure C. brain stem D. ventricles

Correct Answer: B

Rationale: The longitudinal fissure divides the cerebral hemispheres. [Level: Knowledge]

The limbic system is involved in:

A. emotions B. memory C. learning D. all of the above

Correct Answer: D

Rationale: The limbic system governs emotions, memory, and learning. [Level: Knowledge]

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