Which of the following statements regarding the spinal cord is not true?
A) Ascending tracts carry sensory information up to the brain.
B) Cerebrospinal fluid is found within the central canal of the spinal cord.
C) Descending tracts carry motor commands from the brain to a peripheral nerve.
D) The spinal cord extends from the medulla oblongata down to the sacrum.
D
Explanation: The spinal cord extends from the medulla oblongata to the level of the second lumbar vertebra, not the sacrum. The other statements are true.
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