The ependymal cells line the ventricles of the brain. They compose a thin lining along the brain's ventricle cell, and the central canal of spinal cord. They are a type of glial cells. They play an important role in the production of cerebrospinal fluid.
i think the correct answer is B considering that the channels are not always open for the protons to freely diffuse through the inner membrane.
B. Resources will run low so the population will die.
