The basal nuclei, part of the motor circuit, are i

ATI LPN

ATI LPN Test Bank

The basal nuclei, part of the motor circuit, are involved in the initiation and control of:

A. Voluntary movements B. Vision processing C. Auditory processing D. Taste and smell

Correct Answer: A

Rationale: Basal nuclei (ganglia) initiate and refine voluntary movements. Others are unrelated. [Level: Knowledge]

Involuntary motor commands, such as those for reflexes, involve:

A. A single synapse B. Two synapses C. Three synapses D. Four synapses

Correct Answer: A

Rationale: Monosynaptic reflexes (e.g., stretch) involve one synapse (sensory to motor). [Level: Knowledge]

Interneurons play a crucial role in synaptic communication. Where are interneurons primarily located?

A. Between sensory and motor neurons B. Within the dorsal root ganglion C. In the ventral horn of the spinal cord D. Only in the peripheral nerves

Correct Answer: A

Rationale: Interneurons connect sensory and motor neurons, mainly in the CNS. [Level: Knowledge]

The cervical plexus is formed by the spinal nerves from which spinal levels?

A. C1 to C4 B. C5 to C8 C. C1 to C8 D. C7 to T1

Correct Answer: A

Rationale: The cervical plexus arises from C1-C4 spinal nerves. [Level: Knowledge]

The cell bodies of sympathetic preganglionic neurons are located in the:

A. Spinal cord (thoracic and lumbar regions) B. Brainstem C. Autonomic ganglia D. Sympathetic chain ganglia

Correct Answer: A

Rationale: Sympathetic preganglionic cell bodies are in the thoracic/lumbar spinal cord (T1-L2). [Level: Knowledge]

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