セクレチン
a gastrointestinal hormone that stimulates the secretion of water and bicarbonate from the pancreas and bile ducts whenever the stomach empties too much acid into the small intestine
胃があまりに多量の酸を小腸に空にするときはいつも、すい臓と胆管から水と重炭酸塩の分泌を刺激する消化管ホルモン