Postprandial alkaline tide can be attributed to
When H+ is secreted by the oxyntic (partial cells) is response to food HCO3- is added to the blood.
Paneth cells are endocrine cells located in the crypts of Lieberkihn of smell intestine. They may produce guanylin.
Guanylin (+) guanylyl cyclase ↑ed cGMP
↑ed Cl- secretion into lumen ↑activity of CFTR Cl- channel