Physiology Renal physiology 3243813c Filtration barriers have pores, which have size about A 1-2 nm B 4-6 nm C 8-10 nm D 10-12 nm High-Yield Explanation Filtration barrier has pore size of about 4-6 nmRef: Ganong&;s review of medical physiology; 24th edition; page no; 673