Biology
Assertion (A): The arrangement of white and grey matter is reversed in spinal cord from that in the brain.
Reason (R): In brain, the outer portion is white and the inner portion is grey. In spinal cord, the outer portion consists of cytons of neurons whereas the inner portion contains the axons of neurons.
- Both A and R are true.
- Both A and R are false.
- A is true and R is false.
- A is false and R is true.
Nervous System
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Answer
A is true and R is false.
Explanation — In the brain, the outer portion of cerebrum contains the grey matter and the inner portion of cerebrum contains the white matter. In the spinal cord, the arrangement is reversed. In the spinal cord, the inner part is the grey matter made up of cell bodies, while the outer part is the white matter made up of axons.
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