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Gastrointestinal Secretions and Activities

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Gastrointestinal Secretions and Activities

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Questions and Answers

What is the function of saliva in the digestive process?

To begin the digestive process and facilitate swallowing (correct)

To protect the inner lining of the GI tract

To absorb essential nutrients

To aid in the movement of food bolus through the GI tube

What stimulates the release of hydrochloric acid in the stomach?

Gastrin (correct)

Mucus production

Parietal cells

Saliva secretion

Which phase of digestion initiates secretion in the stomach?

Cephalic phase (correct)

Absorptive phase

Intestinal phase

Gastric phase

What is the role of mucus in the digestive system?

<p>To protect the epithelial lining and aid in swallowing</p> Signup and view all the answers

What stimulates histamine-2 (H2) receptors near parietal cells in the stomach?

<p>Gastrin and parasympathetic system</p> Signup and view all the answers

Study Notes

Digestive Process

Saliva plays a crucial role in the digestive process by breaking down carbohydrates into simpler sugars through the enzyme amylase.

Stomach Acid Release

The release of hydrochloric acid in the stomach is stimulated by the hormone gastrin.

Phases of Digestion

The cephalic phase of digestion initiates secretion in the stomach, which is triggered by the sight, smell, and taste of food.

Mucus Function

Mucus in the digestive system protects the stomach lining from the erosive effects of acid and enzymes.

Histamine-2 Receptors

Histamine stimulates histamine-2 (H2) receptors near parietal cells in the stomach, which in turn stimulate the release of gastric acid.

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Description

Learn about the secretion of enzymes, acid, bicarbonate, mucus, absorption of essential nutrients, digestion process, and motility of food through the GI tract. Understand the compounds secreted to aid movement and digestion.