Question

Which of the following correctly characterizes the arachnoid mater?

1. middle layer of the meninges that contains cerebrospinal fluid

2. attached to the surface of the brain and spinal cord

3. outermost layer of the meninges that contains cerebral fluid

4. attached to the inner surface of the cranium and vertebrae

Answer 1

1. middle layer of the meninges that contains cerebrospinal fluid

Step-by-step explanation:

Arachnoid is the middle layer of the meninges that contains cerebrospinal fluid. Arachnoid is the membrane responsible for separating the dura and pia mater, which are the membranss responsible for covering the organs of the central nervous system. Already cerebrospinal fluid is a lubricating fluid that fills the space between aduramater, arachnoid and pia mater

Answer 2

The correct answer is option 1, that is, a middle layer of the meninges that contains cerebrospinal fluid.

The arachnoid mater or the arachnoid refers to the middle layer of the meninges. In certain regions, it protrudes into the sinuses produced by the dura mater. They mediate cerebrospinal fluid back into the bloodstream from the ventricles.

The space present between the arachnoid and the pia mater is known as subarachnoid space. It is occupied with cerebrospinal fluid.