Which of the Following is Least True of the Spinal

Question

Which of the following is least true of the spinal cord?
A) The spinal cord, like the brain, is protected by bone, meninges, CSF, and the blood-brain barrier.
B) The adult spinal cord extends the length of the spinal cavity.
C) The gray matter is composed primarily of cell bodies and interneurons.
D) The white matter is white because of myelin.

Accepted Answer

The adult spinal cord does not extend the entire length of the spinal cavity, as the spinal cavity continues below the end of the spinal cord in the form of the cauda equina.