5 Questions
What is the function of saliva in the digestive process?
To begin the digestive process and facilitate swallowing
What stimulates the release of hydrochloric acid in the stomach?
Gastrin
Which phase of digestion initiates secretion in the stomach?
Cephalic phase
What is the role of mucus in the digestive system?
To protect the epithelial lining and aid in swallowing
What stimulates histamine-2 (H2) receptors near parietal cells in the stomach?
Gastrin and parasympathetic system
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.
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.
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