Lower Motor Neurons directly innervate:

Correct Answer: C

Rationale: LMNs innervate skeletal muscle for voluntary movement. [Level: Knowledge]

Correct Answer: C

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

Correct Answer: B

Rationale: Hydrocephalus results from blocked or impaired CSF flow, causing accumulation. Excessive production or decreased absorption can contribute but aren’t primary. [Level: Comprehension]

Correct Answer: D

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

Correct Answer: A

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