unveiling the microscopic mechanisms of cholecystokinins influence on the gastrointestinal system

cholecystokinin gastrointestinal tract hormone digestion gut microscopic receptors gi physiology endocrine system medicine science healthcare medical cell biology molecular digestive human microscopy scientific gastric motility pancreatic secretion bile peptide intestinal hormones health stomach intestines small intestine large colon research background anatomy structure receptor binding cellular process biological cck enzymes microbiome disorders hormonal regulation signal transduction signaling absorption food barrier function