Question

Throughly describe the physiological differences with the three phrases of digestion

Answer 1

3 phases of digestion are cephalic phase , gastric phase , intestinal phase .

1. Cephalic phase

It occurs before food enters the stomach and is initiated by the sight , smell , thought and smell of food .

2. Gastric phase

In this phase swallowed food stimulates gastric activity in the stomach by stretching the stomach and raising the pH of its contents .

3. Intestinal phase

In this phase stretching of the duodenum enhances gastric function through the vagal nerve , as the rhyme causes the secretion of gastric, which stimulates the stomach.