[ELECTRON MICROSCOPY OF ENTEROCHROMAFFIN CELLS].
D000818:Animals; D002838:Chromaffin System; D004386:Duodenum; D004583:Electrons; D004759:Enterochromaffin Cells; D006168:Guinea Pigs; D008853:Microscopy; D008854:Microscopy, Electron; D012106:Research; D012701:Serotonin
D012701:Serotonin
CHROMAFFIN SYSTEM; DUODENUM; EXPERIMENTAL LAB STUDY; GUINEA PIGS; MICROSCOPY, ELECTRON; SEROTONIN