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Which of the Following Is Not a Planet

question 58

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Which of the following is not a planet?


Definitions:

Central Canal

The longitudinally extending space filled with cerebrospinal fluid that spans the full length of the spinal cord.

Gray Commissure

A narrow band of gray matter that connects the two halves of the spinal cord, located around the central canal.

Reflex Arc

The neurological path that mediates a reflex action, involving at a minimum, a sensory neuron, a motor neuron, and usually an interneuron.

Integration Center

A region in the nervous system where information is processed and interpreted, often resulting in the initiation of a specific response.

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