MEDICAL
RECTUM AND ANUS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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ingestion
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secretion
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digestion
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mechanical processing
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absorption
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Detailed explanation-1: -Secretion: release of water, acid, buffers, and enzymes into lumen of GI tract. 3. Mixing and propulsion: churning and movement of food through GI tract.
Detailed explanation-2: -In chemical digestion, starting in the mouth, digestive secretions break down complex food molecules into their chemical building blocks (for example, proteins into separate amino acids). These secretions vary in composition, but typically contain water, various enzymes, acids, and salts.
Detailed explanation-3: -Pepsin: Pepsin is secreted by the stomach to break down proteins into peptides, or smaller groupings of amino acids. Those amino acids are then either absorbed or broken down further in the small intestine. Trypsin: Trypsin forms when an enzyme secreted by the pancreas is activated by an enzyme in the small intestine.