part of part of has part has part has_part capable of capable of epithelial cell ciliated epithelial cell epithelial cell of distal tubule juxtaglomerular complex cell macula densa epithelial cell An epithelial cell that is part of the macula densa, characterized by a tightly packed arrangement, apically positioned nuclei, and prominent primary cilia, creating a distinctive 'dense spot' appearance under microscopy. It is involved in regulating renal blood flow, glomerular filtration rate, and renin release. macula densa cell KUPO:0001057 regulation of glomerular filtration non-motile cilium regulation of renin secretion into blood stream macula densa