thus , this study supports the contention of previous radioautographic studies that the ecl , but not the a-like , cells are the apud endocrine cells of rat fundic mucosa , that g and d cells also possess some apud activity , and that ec cells represent the enterochromaffin cells , which normally synthesize and store demonstrable quantities of serotonin .
C0014136
endocrine
C0014355
enterochromaffin cells