The glossopharyngeal nerve IX is involved in

ATI LPN

ATI LPN Test Bank

The glossopharyngeal nerve (IX) is involved in:

A. Taste sensation from the posterior one-third of the tongue B. Eye movement C. Facial sensation D. Olfaction

Correct Answer: A

Rationale: The glossopharyngeal nerve (CN IX) handles posterior tongue taste and swallowing. [Level: Knowledge]

Identify the three basic parts of a neuron:

A. Axon, cell body and dendrite B. Axon, dendrite and myelin C. Cell body, dendrite and myelin D. Cell body, dendrite and neuroglia

Correct Answer: A

Rationale: A neuron has a cell body (soma), dendrites, and axon. Myelin and neuroglia are accessories. [Level: Knowledge]

What mechanism helps keep the neuron membrane at its resting potential?

A. passive diffusion of ions B. active transport sodium-potassium pump C. filtration of ions D. pinocytosis of ions from one side to another

Correct Answer: B

Rationale: The Na+/K+ pump maintains resting potential (-70 mV) by pumping Na+ out, K+ in. [Level: Knowledge]

The ventral root of the spinal cord contains _____ fibers and the dorsal root of the spinal cord contains _____ fibers:

A. sensory: motor B. motor: sensory C. sensory and motor: sensory D. sensory: sensory and motor

Correct Answer: B

Rationale: Ventral root: motor (efferent); dorsal root: sensory (afferent). [Level: Knowledge]

Places on the cerebral cortex where integration occurs are:

A. somatosensory areas B. association areas C. motor areas D. none of the above

Correct Answer: B

Rationale: Association areas integrate sensory/motor information for higher functions. [Level: Knowledge]

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