Cholecystokinin:AbbreviatedCCK. Apolypeptidehormonethat stimulates thecontractionof thegallbladder与释放bileand the secretion ofpancreaticenzymesinto thesmall intestine. CCK is secreted by cells lining the upperintestineand by thehypothalamus. Hypothalamiccholecystokininis aneurotransmitter. Called alsopancreozymin.
