What are the 3 phases of gastric secretion?

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Detailed Solution

The three phases of gastric secretion are cephalic phase, gastric phase, and intestinal phase.

1. Cephalic Phase

This phase begins before food enters the stomach. The sight, smell, or thought of food stimulates the brain to send signals that increase gastric juice secretion.

2. Gastric Phase

This phase starts when food enters the stomach. Stretching of the stomach walls and the presence of proteins stimulate cells to release gastric juices rich in hydrochloric acid and pepsin.

3. Intestinal Phase

This phase occurs when partially digested food enters the small intestine. Hormones regulate and slow down gastric juice secretion to allow proper digestion and absorption in the intestine.

Phase	Trigger	Function
Cephalic	Sight/smell of food	Prepares stomach for digestion
Gastric	Food in stomach	Secretes acid and enzymes
Intestinal	Food in small intestine	Controls stomach emptying

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