HISTOLOGY
DIGESTIVE SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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enzyme
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saliva
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Either A or B
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None of the above
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Detailed explanation-1: -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.
Detailed explanation-2: -Chemical digestion in the mouth is minor but consists of salivary amylase (ptyalin, or alpha-amylase) and lingual lipase, both contained in the saliva. Salivary amylase is chemically identical to pancreatic amylase and digests starch into maltose and maltotriose, working at a pH optimum of 6.7 to 7.0.
Detailed explanation-3: -Amylase, maltase, and lactase in the mouth digest carbohydrates. Trypsin and lipase in the stomach digest protein. Bile emulsifies lipids in the small intestine. No food is absorbed until the small intestine.