human_reference_atlas part of cell cell type (from CL) neurecto-epithelial cell non-pigmented ciliary epithelial cell NPE cell non-pigmented ciliary epithelial cell A cell that is part of non-pigmented ciliary epithelium. This cell type participates in aqueous humor formation by releasing solute, principally sodium and chloride ions received from pigmented epithelial cells via gap junctions, into the aqueous humor of the eye. nonpigmented ciliary epithelial cell non-pigmented ciliary epithelial cell FMA:70607 CT 2010-09-13T04:09:31Z CL:0002304 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. Homo sapiens eye ciliary body ciliary epithelium