Question

Cerebrum is in direct contact with
(a)Dura mater
(b)Arachnoid
(c)Pia mater
(d)Enterocoel

Answer 1

Hint: Cerebrum is the largest part of the human brain and is made up of two cerebral hemispheres and their cortices. It is in direct contact with the innermost layer of meninges.

Complete answer:
The cerebrum is in direct contact with the pia mater which is the delicate innermost layer of the meninges. With dura mater and arachnoid, it consists of the meninges that surround the brain and spinal cord. It allows the blood vessels to pass through and nourish the brain cells.

Additional Information: The cerebrum is the largest part of the brain and the uppermost region of the CNS. It consists of the cerebral cortex as well as some subcortical structures such as the hippocampus, basal ganglia, and Olfactory bulb. It is made up of two cerebral hemispheres and their cortices with the underlying white matter. It is in close connection with the innermost layer of meninges i.e. pia mater.
Pia mater is derived from the neural cast and made of thin fibrous tissue that is permeable to water. It is absent at the natural openings between the medium aperture, ventricles, and lateral aperture. The function of this layer is to protect and cover the CNS, to protect the blood vessels and enclose the venous sinuses, to contain the CSF, and lastly to form partitions with the skull.
So, the correct answer is “Pia mater”.

Note: Dura mater is the thick membrane that surrounds the brain and spinal cord and is the outermost layer of the meninges. It is made of dense irregular tissue and is derived from the neural cast with postnatal contributions of the paraxial mesoderm. The Arachnoid is interposed between dura and pia mater. It is derived from the neural crest mesectoderm.