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Questions and Answers
Match the components of gastric juice with their functions:
Match the components of gastric juice with their functions:
Hydrochloric acid = Creates acidic environment for digestion Pepsin = Breaks down proteins Mucus = Lubricates food and protects stomach lining Gastric juice = Facilitates chemical digestion
Match the processes occurring in the stomach with their descriptions:
Match the processes occurring in the stomach with their descriptions:
Mechanical digestion = Mixing and churning of food Chemical digestion = Breakdown of food by enzymes Peristalsis = Muscle contractions for food movement Production of chyme = Transformation of food into liquid form
Match the following terms with their correct definitions:
Match the following terms with their correct definitions:
Chyme = Partially digested food in liquid form Esophagus = Tube connecting throat to stomach Gastric glands = Secrete digestive juices Four hours = Time food typically stays in stomach
Match the following stomach functions with their roles:
Match the following stomach functions with their roles:
Match the following digestive elements with their sources:
Match the following digestive elements with their sources:
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Study Notes
Structure and Function of the Stomach
- The stomach operates as a muscular "bag," featuring a band of muscle at each end to control food entry and exit.
- Expands upon receiving food from the esophagus, preparing for digestion.
Digestion Processes
- Both mechanical and chemical digestion occur within the stomach.
- Mechanical digestion involves mixing and churning of food by muscular walls and peristalsis.
- Chemical digestion is facilitated by gastric juice, secreted by stomach glands.
Gastric Juice Composition
- Gastric juice is primarily composed of hydrochloric acid and the enzyme pepsin.
- Pepsin functions to break down proteins under the acidic environment of the stomach.
Protective Mechanisms
- Mucus production is crucial for lubricating food and the digestive tract.
- Mucus serves to protect the stomach lining from harsh digestive juices.
Chyme Formation
- Partially digested food remains in the stomach for approximately four hours.
- This food transforms into chyme, a thin, watery liquid that gradually enters the small intestine.
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