Protein filtration across cerebral capillaries is limited by-
Fibrous tissue
Foot process of astrocytes
Low BP
High CSF pressure
Ans. is 'b' is Foot process of astrocytes. Blood brain barrier does not allow filtration of any substances across it except for lipid soluble substances.It is formed by thetight junctions of the endothelial cells*foot processes of the astrocytes around the capillaries*Also rememberAreas outside the blood brain barrierPosterior pituitary*Area postrema*OVLT (Organum vasculosum of the lamina terminalis)*Subfornical organ*These are collectively k/a circumventricular organs*.
Miscellaneous Nervous System