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प्रश्न
How do we know that we are hungry and that we should now eat?
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उत्तर
When the level of energy giving substances present in the blood falls down, our brain can understand it. The brain tells us that 'we are hungry and we should eat something to restore this level.· Thus, the coordinating brain gives us order to eat.
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संबंधित प्रश्न
What is the special name of the contraction and expansion movement which pushes the food further in our digestive tract (or alimentary canal)?
Which of the following component of our food is digested by an enzyme which is present in saliva as well as in pancreatic juice?
| 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?
Fill in the blank.
The teeth called ______ are a total of four in number on the sides of incisors
Food are classified into three groups on the basis of the function they perform in our body. Name the three categories, and briefly give their functions. Also give their two sources each.
Sketch and label a diagram of the digestive system and describe it in your own words.
Name the salivary glands in our mouth?
Throughout the length of the alimentary canal the layer which shows the presence of goblet cells is ______
All are functions of the liver, EXCEPT
