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प्रश्न
Define digestion.
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उत्तर
It is the breaking down of complex insoluble food components into simple soluble substances.
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संबंधित प्रश्न
Which of the organs perform the following function in humans?
Absorption of water
Name the following:
An enzyme secreted by gastric glands in stomach which acts on proteins.
The process of digestion of food in humans begins in ______.
If the saliva is lacking in salivary amylase, then which of the following processes taking place in the buccal cavity will be affected?
| When a person eats sugary food, then organisms A present in his mouth act on sugar to produce a substance B. The substance B first dissolves the calcium salts from the top part C of the tooth and then from its middle part D forming holes E. These holes ultimately reach the part F in the lower part of tooth which contains nerves and blood vessels. The substance B irritates the nerve endings inside the tooth causing toothache. |
- What are (i) organisms A, and (ii) substance B?
- What are (i) part C, and (ii) part D, of tooth known as?
- By what name are the holes E in the tooth known?
- Name the part F of the tooth.
- What will happen if organisms A reach part F of the tooth known?
Define the following term:
Assimilation
Write the function of the following in the human alimentary canal:
Saliva
State whether the following statements are True or false: Na+ is absorbed in intestine by sodium pump.
Name the enzymes secreted by the following: Stomach
What’s the solution?
A person has fainted, and a crowd of people has surrounded him.
Write any two functions of digestive system.
Bile helps in the digestion of ______.
The pyloric sphincter guards the passage between the ____________.
Select the correct pair of peptide hormones secreted by the alimentary canal.
A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains:
Liver produces for ______ the digestion of fat.
During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the
Mark the following statement as True or False. If false, write the correct statement.
All heterotrophs have a similar basic process of nutrition.
Solve the crossword given as Figure.
| Across | Down | ||
| 1. | Cream-coloured digestive gland | 2. | Feeds with the help of pseudopodia |
| 3. | Undigested excretory solid residues | 6. | Total number of molars in one jaw of an adult |
| 4. | Organ that mixes saliva with the food | 8. | Largest gland |
| 5. | Point of defecation | 9. | Watery secretion in the mouth |
| 7. | Stored in gall bladder | 11. | A ruminant |
| 10. | Finger-like outgrowth in the small intestine | 12. | Form of food chewed by ruminants |
| 13. | Kind of taste buds | ||
| 14. | Kills bacteria in the stomach | ||
The complete digestion and absorption of nutrients is done by the small intestine. Which of the following greatly enhances the process of absorbtion?
