胰腺内、外分泌部分都有。它通过导管分泌消化液，又向血流分泌这种胰岛索激素。
The pancreas has both exocrine and endocrine portions. It secretes digestive juice through ducts, and secretes the hormone insulin into the blood stream.
汗腺导管细胞和分泌细胞具有不同的电生理现象，正常状态下分泌细胞静息膜电位明显高于导管细胞。
Cells in the secretory portion and duct have different electrophysiological phenomena. At normal condition, resting membrane potential of secretory cells was obviously higher than that of duct cells.
其发病机理尚不完全清楚，主要包括：皮脂分泌过多、毛囊皮脂腺导管的过度角化、痤疮丙酸杆菌增殖、过度的免疫反应等。
The pathogenesis is not clear, including: excessive secretion of sebum, follicle sebaceous gland duct hyperkeratosis, Propionibacterium acnes proliferation and excessive immune reactions ect.
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