A) Basal lamina can be divided into the lamina densa and lamina lucida B) Desmosomes are an effective barrier to the diffusion of substances across an epithelium. C) In pseudostratified epithelia all epithelial cells contact the basement membrane. D) The basal lamina can act as a selective filter between the epithelium and the connective tissue. E) Tight junctions between epithelial cells are an effective barrier to the diffusion of substances across an epithelium.