The Cephalic phase, the Gastric phase, and the Intestinal phase.
Before food enters the stomach and is triggered by aroma, sight, or thought.
it is triggered by the smell, taste, sight, or thought of food. parasympathetic impulses trigger gastric juice secretion.
entry of food into the stomach
control of gastroc secretion is divided to cephalic phase, gastric phase and intestinal phase. Among these, intestinal phase means gastric secretion in stomach as a result of stimulation in intestine by food. when the food reaches the intestine it secrete gastrin and the hormone transports to stomach by circulation. amount of secretion in intestinal phase is smaller and slower than that of cephalic and gastric phase. by the way if substance like acid, lipid or any high osmotic solution entered intestine, duodenum, gastric secretion decreases this time. This is because of enterogastrone released from duodenum. there are also other hormones such as cholecystokinin and gastric inhibitory peptide. they inhibit the secretion in stomach.
HCl (gastric acid), pepsinogen
HCl (gastric acid), pepsinogen.
ANSWER IS: Gastric secretion can be stimulated before food has entered the mouth.A.Gastric secretion can be stimulated before food has entered the mouth.B.Gastric secretion is enhanced by very low pH (below a pH of 2)C.The presence of food in the stomach prevents hormonal control of gastric secretion.D.Vagus stimulation of the stomach results in decreased secretion of gastric juice.