The answer is blood plasma. Blood
plasma is ultrafiltrated
by the choroidal capillaries to become cerebral spinal fluid, about
50%. The rest is secreted by the cells of
the choroid plexus and ventricular ependyma. They contain the same elements in the blood plasma necessary for the nourishment an proper functioning of cells
Answer:true:))
Explanation:I don’t know how to find this information but I put true on the test and got it right:)
