10 Questions
What is the primary function of the teeth in the digestive process?
To crush the food into smaller particles
What is the purpose of saliva in the digestive process?
To lubricate the food for smooth passage
What is the role of the muscular tongue in the digestive process?
To mix food with saliva
What is the function of peristaltic movements in the digestive system?
To move food in a regulated manner along the digestive tube
What is the purpose of the stomach in the digestive process?
To mix food with more digestive juices
What is the name of the enzyme present in saliva that breaks down starch?
Salivary amylase
What is the function of the salivary glands in the digestive process?
To secrete saliva that breaks down starch
What is the primary function of the alimentary canal?
To process food into smaller particles
What is the name of the tube that carries food from the mouth to the stomach?
Oesophagus
What is the role of the muscles in the lining of the canal in the digestive process?
To move food forward through the digestive tube
Study Notes
Digestive Process
- Food is processed to generate small particles of the same texture through crushing by teeth and wetting to facilitate smooth passage through the soft-lined digestive canal.
- Saliva, a fluid secreted by salivary glands, is released when we eat something we like, and it contains an enzyme called salivary amylase that breaks down starch into simple sugar.
Enzymes and Digestion
- Biological catalysts called enzymes break down complex molecules of food into smaller molecules for absorption in the alimentary canal.
- Salivary amylase in saliva breaks down starch into simple sugar.
Movement of Food
- The muscular tongue mixes food thoroughly with saliva and moves it around the mouth while chewing.
- The lining of the digestive canal has muscles that contract rhythmically in a peristaltic movement to push food forward through the digestive tube.
The Stomach
- The stomach is a large organ that expands when food enters it.
- The muscular walls of the stomach mix food thoroughly with digestive juices.
- Gastric glands in the stomach wall release hydrochloric acid, pepsin (a protein-digesting enzyme), and mucus.
- Hydrochloric acid creates an acidic medium that facilitates the action of pepsin.
- Mucus protects the inner lining of the stomach from the action of hydrochloric acid under normal conditions.
This quiz is about the process of digestion, focusing on the role of teeth and saliva in breaking down food into small particles. It explores the importance of saliva in making food passage smooth and its secretion by the salivary glands.
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