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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
Fat is completely digested in the ______.
Label the following figure of the digestive system.
A part of the human digestive system
Iodine turns blue-black on reacting with ______.
What is the role of hydrochloric acid in our stomach?
Name the following:
An enzyme secreted by gastric glands in stomach which acts on proteins.
What is the special name of the contraction and expansion movement which pushes the food further in our digestive tract (or alimentary canal)?
Name the main organs of the human digestive system.
The process of digestion in humans is completed in ______.
| The partially digested food coming from the stomach of a person enters a long and narrow organ A in his body. The organ A receives the secretion of two glands : liver and pancreas. Liver secretes a greenish-yellow liquid B which is normally stored in the organ C. Pancreas secretes pancreatic juice which contains three digestive enzymes D, E and F. The intestinal juice completes the process of digestion of food. The inner wall of organ A has millions of tiny finger-like projections G which help in the rapid absorption of digested food into blood stream. The undigested part of food then passes into wider tube H which absorbs most of the water from undigested food. The last part of tube H called I stores this undigested food (or waste) for some time. The undigested food is then passed out though opening J as faeces in the process known as K. |
- Name the organ A.
- Name (i) liquid B, and (ii) organ C.
- What are the digestive enzymes D, E and F?
- Name the projections G present on the inner wall of organ A.
- Name (i) tube H (ii) part I (iii) opening J, and (iv) process K.
Why is there no enzyme to digest vitamins?
Fill in the blank.
Molars are meant for _____ the food.
Write true or false for the below statement. Rewrite the false statements correctly.
Digestion of food in the intestine takes place in the presence of dilute hydrochloric acid.
Write true or false for the below statement. Rewrite the false statements correctly.
Water is absorbed in large intestine
State one difference in nutrition: Holophylic and Holozoic
The question has four options. Choose the correct answer:
Uvula can close the opening of
The question has four options. Choose the correct answer:
The liver performs the function of
Which systems work together to provide the body with energy?
Observe the diagram. This is the histological structure of the stomach. Identify and comment on the significance of the layer marked by an arrow.
In which part of the alimentary canal food is finally digested?
Name the correct substrates for the following enzymes
- Trypsin
- Amylase
- Pepsin
- Lipase
