Question

HELPPP PLEASE URGENT Graham met with an accident, where he damaged his retina. The doctor suggested that Graham lost his eyesight. The only possible solution would be retinal transplantation. What could be the reason that the retinal cells unlike those of skin cells do not regenerate?

Retinal cells are terminally differentiated; therefore, they cannot undergo mitotic division once they are matured.

Retinal cells are pleuripotent cells; therefore they cannot undergo mitotic division once they are matured.

Retinal cells are totipotent cells; therefore they cannot undergo mitotic division once they are matured.

Answer 1

its the first one....once they are matured they dont regenerate !!

Answer 2

Retinal cells are terminally differentiated; therefore, they cannot undergo mitotic division once they are matured.

Step-by-step explanation:

A cell that is no longer to undergo the process of mitosis is terminally differentiated cell. The retinal cells are terminally differentiated cells which means that these cells are permanently out of the cell cycle. Since the retinal cells can not undergo mitosis, the retina can not replace its damaged cells naturally and retinal transplantation is recommended for the patients with the damaged retina.