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प्रश्न
Answer in detail.
What changes occur in food in the mouth?
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उत्तर
The mouth is the first part of the digestive system. It receives food and starts mechanical digestion. The ingested food is first broken down in the mouth when it is chewed. Simultaneously it gets mixed with the saliva. This process is called mastication or mechanical digestion. It prepares the food for chemical digestion, that is, the digestion by action of enzyme. The teeth help in chewing down the food. There are 4 kinds of teeth. These are incisors, canines, premolars and molars, incisors are the cutting teeth. These help in biting and cutting the food. Canines are the tearing teeth that helps to tear and hold the food. Premolars and molars are the crushing and grinding teeth which help in grinding the food. When we chew the food it is mixed with saliva, secreted by salivary glands softens the food. Saliva contains an enzyme called salivary amylase also called ptyalin, acts on starch to convert it into maltose.
starch \[\ce{->[salivary][amylase]}\] maltose.
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संबंधित प्रश्न
Pancreas, Gall bladder, Glomerulus, Liver
Water from the undigested food is absorbed mainly in the ______.
In which part of the digestive system is water absorbed?
Where is digested food absorbed into blood in human body?
Pancreatic juice contains enzymes which digest:
(a) proteins and carbohydrates only
(b) proteins and fats only
(c) fats and carbohydrates only
(d) proteins, fats and carbohydrates
Put a tick (✓) against the most appropriate alternative in the following statement.
The hardest substance in your body?
Differentiate between.
Mechanical digestion and Chemical digestion
Complete the following enzymatic reaction.
Fats \[\ce{->[lipase]}\] ___________+__________
The enzymes present in the saliva convert ______.
What is chyme?
