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प्रश्न
How do the salivary glands come to know that there is food in the mouth and it is time to secrete saliva?
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उत्तर
Through the nerves present in the mouth, the brain comes to know that there is food in the mouth. The brain then gives orders to the salivary glands to secret the saliva. Thus when there is food in the mouth, automatic secretion of saliva takes place.
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संबंधित प्रश्न
Which of the organs perform the following function in humans?
Absorption of water
Study the diagram given below and then answer the question that follows:
Give the total number of the type of tooth mentioned in '1' above, in the mouth of an adult and state its function.
Write the function of the following in the human alimentary canal:
Villi
Define with examples: Carnivores
Observe the diagram. This is the histological structure of the stomach. Identify and comment on the significance of the layer marked by an arrow.
The passage of food into the stomach is controlled by the ______.
Identify the salivary gland lying below the tongue.
The contraction and expansion movement of the walls of the food pipe is called ____________.
Name the parts of the alimentary canal where water gets absorbed from undigested food.
Read the following passage carefully and answer the questions that follow it.
| Bile juice is stored in a sac called, gall bladder, located near its organ of secretion, liver. The gall bladder releases the bile juice into the small intestine whenever food reaches there. Though bile juice is devoid of any digestive enzymes, it is required for the digestion of fats. The fats cannot be digested easily because they are insoluble in water and are present as large globules. Bile juice breaks down big fat droplets into smaller droplets. These are then easily digested by the enzymes released from the pancreas. |
- Which organ secretes the bile juice?
- Why is digestion of fats difficult as compared to that of other nutrients?
- How does bile juice help in the digestion of fat?
- Where is the digestion of fat completed?
- Does bile juice digest fat completely?
