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प्रश्न
Give two reasons, why bile juice is considered to be an important secretion of liver in the process of digestion?
उत्तर
- The food coming from the stomach is acidic and has to be made alkaline for the pancreatic enzymes to act. Bile juice from the liver accomplishes this in addition to acting on fats.
- Fats are present in the intestine in the form of large globules which makes it difficult for enzymes to act on them. Bile salts break them down into smaller globules increasing the efficiency of enzyme action. The inner lining of the small intestine has numerous finger-like projections called villi which increase the surface area for absorption.
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संबंधित प्रश्न
The length of small intestine in a human adult is about:
(a) 4.5 m
(b) 1.5 m
(c) 3.5 m
(d) 6.5 m
The process of digestion of food in humans begins in:
(a) stomach
(b) food pipe
(c) mouth
(d) small intestine
Fill in the blanks in the table (1-5) by selecting the suitable names of substances from the list given below:
(steapsin, peptones, fatty acids, proteoses, protein).
| Digestive Enzymes | Acts on | To convert into |
| (i) Pepsin | _________(2) | ________(3) and |
| (ii) _______(1) | Fats |
________(4) _________(5) |
Complete the following enzymatic reaction.
Maltose \[\ce{->[maltase]}\] ___________
Correct the spellings: Ptorein
Write down the explanation.
Explain the structure of tooth.
Select the correct pair of peptide hormones secreted by the alimentary canal.
Salivary glands secrete ______.
What is chyme?
What are villi?
