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Question

Cerebral cortex consists of

A
Grey matter
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B
Duramater
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C
White matter
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D
Arachnoid mater
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Solution

The correct option is A Grey matter
  • Grey matter consists of cell bodies, dendrites and axon terminals of neurons and thus has all synapses.
  • It serves to process sensory information. Cerebral cortex is a thin highly convoluted layer of grey matter that covers cerebral hemispheres.
  • Cerebral cortex is responsible for sensation, voluntary actions, and all conscious thought processes and thus consists of grey matter.
  • White matter consists of myelinated and unmyelinated nerve fibers that carry impulses to and from the brain. It is mainly present in the sensory and motor areas of the brain.
  • Dura mater is the outer most protective layer of the brain and is made up of tough, white fibrous connective tissue.
  • Arachnoid mater is the middle protective layer of brain and consists of weblike connective tissue with thin strands.
Therefore, the correct answer is option A.

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