although oxyntic cell secretion can be studied at many organisation levels between isolated cell suspensions and non-invasive techniques in animals , the isolated , lumen-perfused , stomach preparation of the mouse represents a hierarchical level which eliminates extrinsic regulatory influences but retains all the cellular architecture known to be necessary for physiological responses and so can be defined as the physiological unit of acid secretion .
C1327616
cell secretion
C0007634
cellular