The delicate, innermost layer of the meninges that

ATI LPN

ATI LPN Test Bank

The delicate, innermost layer of the meninges that directly adheres to the surface of the brain and spinal cord is the:

A. Pia mater B. Dura mater C. Arachnoid mater D. Subarachnoid mater

Correct Answer: A

Rationale: The pia mater is the innermost layer, closely following CNS contours. [Level: Knowledge]

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]

The reticular formation is a network of nuclei scattered throughout the brainstem that plays a crucial role in:

A. Motor control B. Sensory processing C. Sleep and consciousness D. Memory formation

Correct Answer: C

Rationale: The reticular formation regulates sleep, arousal, and consciousness. [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]

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