Which meningeal layer is closely adherent to the s

ATI LPN

ATI LPN Test Bank

Which meningeal layer is closely adherent to the surface of the brain and spinal cord, following all the convolutions and fissures?

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

Correct Answer: A

Rationale: The pia mater adheres tightly to CNS surfaces, following all contours. [Level: Knowledge]

The hypothalamus plays a crucial role in:

A. Temperature regulation, hunger, and thirst B. Voluntary muscle control C. Auditory processing D. Visual perception

Correct Answer: A

Rationale: The hypothalamus regulates homeostasis (temperature, hunger, thirst). Others are unrelated. [Level: Knowledge]

White matter in the spinal cord primarily contains:

A. Cell bodies and dendrites B. Myelinated axons C. Unmyelinated axons D. Synaptic terminals

Correct Answer: B

Rationale: White matter consists of myelinated axons forming tracts. [Level: Knowledge]

Upper Motor Neurons from the motor cortex synapse with Lower Motor Neurons in the:

A. Dorsal horn B. Ventral horn C. Grey commissure D. Lateral horn

Correct Answer: B

Rationale: UMNs synapse with LMNs in the ventral horn for motor output. [Level: Knowledge]

Which plexus contributes to the innervation of the diaphragm?

A. Cervical plexus B. Brachial plexus C. Lumbar plexus D. Sacral plexus

Correct Answer: A

Rationale: The cervical plexus (C3-C5) gives rise to the phrenic nerve for the diaphragm. [Level: Knowledge]

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