Cerebrospinal fluid is formed by a. arachnoid granulations, b. dura mater, c. choroid plexuses, d. all of these.

Video transcript

Hello everyone and welcome to today's video to the choroid plexus that forms the CS F is enclosed by or first by the blank and then by a layer of blank cells, the line the ventricles as answer choice A, we have the B the PC, the dura matter the matter. Now, in order to solve this problem, there's two main things that we need to know. First of all, in this second blank that we have in the question, we're going to be looking for a type of cell that can be either or a pan. Now, cells do not line the ventricles. It is only a pan cells are able to line the ventricles here and therefore it cannot be one cells in this second blank. So we're going to be eliminating answer choices A and C because they have one cells for the second blank. Now we are left with answer choices B and D which can either be P A matter or dura matter for the second blank. So as it turns out the dura matter is going to be the most superficial layer and is closest to the school. Now, we are told that the chore plexus that forms the CS F is enclosed first by the blank because the dura matter is the most superficial layer, it cannot be enclosing first. This plexus. Therefore, we're going to also eliminate answer choice D and this only leaves us with answer choice B. So we're going to add this to the blanks. So the P so the coleus that forms CS F is enclosed first by the PM and then a layer of blank which is going to be, or cells that line the ventricles, this is going to be making answer choice B A and then the final answer to our question. I really hope it's helped you and I hope to see you on the next one.