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प्रश्न
Give a reason.
Food becomes acidic in the stomach.
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उत्तर
Food becomes acidic in the stomach because of the presence of hydrochloric acid. As the food reaches the stomach, it gets mixed with the hydrochloric acid present there. The hydrochloric acid plays the following roles in digestion:
- It initiates protein digestion by activating the conversion of pepsinogen to pepsin.
- It provides an acidic medium for the activity of pepsin and other enzymes present in gastric juice.
संबंधित प्रश्न
How are fats digested in our bodies? Where does this process take place?
What is the other name of food pipe?
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
Write the function of the following in the human alimentary canal:
Bile juice
What do you mean by the absorption of food?
Fill in the blanks.
Grinding of food is brought about by _______ and ______
Fill in the blanks.
______ and ______ help in digestion but food does not pass through them.
State whether the following statements are True or false: Trypsin coagulates the milk protein.
Mark odd one in the series:
Correct the spellings: Bilirubin
Name the organs of the digestive system
Observe the diagram. This is the histological structure of the stomach. Identify and comment on the significance of the layer marked by an arrow.
List out the functions of the digestive system.
The pyloric sphincter guards the passage between the ____________.
All are functions of the liver, EXCEPT
Observe the diagram of Human digestive system.
Match the labeling referred in column I and correlate with the function in column II.
| Column I | Column II | |
| i. | a. | The length of this depends on food the organism eats. |
| ii. | b. | Initial phase of starch digestion |
| iii. | c. | Increase the efficiency of lipase enzyme action |
| iv. | d. | This is the site of the complete digestion of carbohydrates, proteins and fats. |
List the parts of the digestive system.
What is the significance of the emulsification of fats?
Explain the role of the mouth in digestion of food.
