human_reference_atlas part of has characterizing marker set has marker component ATP1A1 cell cell type (from CL) neurecto-epithelial cell pigmented ciliary epithelial cell A cell that is part of pigmented ciliary epithelium. This cell type uptakes sodium and chloride ions from stromal interstitium and passes the ions to non-pigmented ciliary epithelial cells via gap junctions. pigmented ciliary epithelial cell FMA:70606 pigmented ciliary epithelial cell CL:0002303 CT 2010-09-13T04:09:27Z In a consensus model of unidirectional secretion, aqueous humour is formed by transferring solute, principally NaCl, from stroma to posterior chamber, with water passively following the osmotic gradient. Unidirectional secretion comprises three sequential steps. First, NaCl is transferred from the stromal interstitium into the pigmented ciliary epithelial (PE) cells. Second, solute passes from the PE into the non-pigmented ciliary epithelial (NPE) cells through gap junctions. Finally, NPE cells release Na+ and Cl− into the aqueous humour. PE cell Homo sapiens sequence collection eye ciliary body ciliary epithelium