Striated duct (secretory duct v wall: simple columnar epithelium; the nucleus is near the cell apex, cytoplasm is acidophilic, has basal striations EM: the basal striations created by membrane infolding and mitochondia reabsorbing sodium and excreting potassium; transport water and ions▪ Striated duct (secretory duct) ✓wall: simple columnar epithelium; the nucleus is near the cell apex; cytoplasm is acidpphilic; has basal striations ✓ EM: the basal striations created by membrane infolding and mitochondia ✓ reabsorbing sodium and excreting potassium; transport water and ions