diffuse neuroendocrine cell less, pyramidal EM: dense-core g.-small granule cell neuroepithelial body: cell+ NF Function: secret hormones to regulate contract of SM and secretion of gland . 5-hydroxytryptamine(serotonin) calcitonin ⅲi. enkephalin clear basement membranediffuse neuroendocrine cell: -less, pyramidal -EM: dense-core g.-small granule cell neuroepithelial body: cell + NF -Function: secret hormones to regulate contract of SM and secretion of gland i. 5-hydroxytryptamine(serotonin) ii. calcitonin iii. enkephalin * clear basement membrane