Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Which of the following statements are correct? (1) Grey matter surrounds the white matter in the spinal cord (2) Grey matter surrounds the white matter in the brain (3) White matter surrounds the grey matter in the spinal cord (4) White matter surrounds the grey matter in the brainA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: C
Solution :
The spinal cord is a cylinder of nervous tissue running from the base of the brain down the back. It is protected by the vertebrae of the backbone (vertebral column) and the meninges. It has a H-shaped central area of grey matter, composed of nerve cell bodies, dendrites and synapsis surrounding a central canal which contains cerebrospinal fluid. Around the grey matter, is an outer layer of white matter. containing nerve fibres whose fatty myelin sheaths give it its characteristic colour.
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