HISTOLOGY
DIGESTIVE SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Where does chemical digestion start?
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Small intestine
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Oesophagus
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Mouth
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Stomach
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Explanation:
Detailed explanation-1: -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-2: -Chemical digestion of food starts in the mouth. The mouth has salivary glands that secrete an enzyme called amylase. This enzyme acts on complex carbohydrates present in the food and converts them into simpler forms.
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