Question

The function of choroid plexus and ependymal cells is?
a. To produce lymph
b. To produce blood
c. To produce cerebrospinal fluid
d. To produce endolymph

Answer 1

Hint: The choroid plexus is a complex network of cells that are built from the tela choroidea. It is found in each of the ventricles of the brain. The choroid plexus is made up of modified ependymal cells that are surrounding a core of capillaries and loose connective tissue.

Complete answer:
The choroid plexus is a plexus of cells that grow up from the tela choroidea. It is a complex network of blood capillaries. The choroid plexus is alternatively known as plica choroidea which acts as a secretory tissue. The choroid plexus lined up with the modified types of ependymal cells that enclosed a core of capillaries and loose connective tissue.

The choroid plexus is composed of a layer of cuboidal epithelial cells and these cells surrounding a core of capillaries and loose connective tissue. The epithelium of the choroid plexus remains connected with the ependymal cell layer that forms the ventricular system.

The ependymal cells are a type of glial cell that lines up in the ventricles in the brain and the central canal of the spinal cord. These are nervous tissue cells that have a simple columnar shape which has a close similarity of some mucosal epithelial cells.

The choroid plexus produces a clear and colourless fluid-like substance which is known as cerebrospinal fluid or CSF. This cerebrospinal fluid provides protective buoyancy for the brain which also acts as a medium for the glymphatic filtration system that facilitates the removal of metabolic waste from the brain. CSF also helps in the exchange of biomolecules and xenobiotics into and out of the brain. The ependymal cells also play an important role in the production and regulation of CSF.

Hence, the correct answer is option (C).

Additional information:
The choroid plexus is found in each of the four ventricles of the brain. In the lateral ventricles, it is present in the body and continued in an enlarged amount in the atrium. In the anterior horn, there is no choroid plexus present. In the third ventricle, there is a small amount present in the roof that is continuous with that in the body.

Note: The choroid plexus is a combination of cells found in each ventricle of the brain. It is made up of blood capillaries and the ependymal cells. Ependymal cells are a type of epithelial cell. The choroid plexus functions as the producer of cerebrospinal fluid, which gives protective buoyancy to the brain. CSF serves as a medium for the system of glymphatic filtration.