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Q. Highly vas...

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Q. Highly vascular and closely investing protective cost around brain is known as:?
"I think the ans is Dura mater but the answer given is Pia mater. Why? Both are vascular and dura-mater is the harder one?"

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Solution

Pia mater is attached to CNS (closely investing to CNS)

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Q. Outermost covering of the brain is
(a) dura mater
(b) pia mater
(c) arachnoid
(d) pericardium

The insulating sheath covering the axon is called

(a) plasmalemma (b) neurilemma

(c) dura mater (d) pia mater

The outermost cover lying below the skull and vertebral column is doubly thick and is called Dura mater.

Q. Use words from the given list to complete the following paragraph. (Vertebral column, Pia mater, Arachnoid membrane, Meninges, Dura mater)
The central nervous system is covered by three protective coverings collectively called _(1) _. The outermost cover lying below the skull and _(2)_ is double thick and is called _(3) _. The middle covering is thin and vascularised and is called _(4) _. The innermost cover is a very thin delicate membrane and is closely stretched over the outer surface of the Brain and Spinal Cord and is called _(5) _.

State whether the following statements are true (T) or false (F).

(a) The main component of the white matter of the brain is perikaryon. (T/F)

(b) The arachnoid layer fits closely inside the pia mater (T/F)

(c) A double chain of ganglia, on eon each side of the nerve cord belongs to the spinal cord. (T/F)

(d) Dura mater is the outermost layer of the meninges. (T/F)

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