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प्रश्न
Why is the small intestine the most important organ of the digestive system?
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उत्तर
The small intestine is the most important organ of the digestive system as it serves both, for digestion and absorption. It receives two digestive juices; the bile and the pancreatic juice in the duodenum. These two juices virtually complete the digestion of starch, proteins, carbohydrates, etc. After the breakdown of food, the small intestine absorbs simple substances such as glucose, amino acids, etc.
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संबंधित प्रश्न
How are fats digested in our bodies? Where does this process take place?
What substance is mixed with food in the mouth during chewing by the teeth?
Where is digested food absorbed into blood in human body?
Name the substances on which the following enzymes act in the human digestive system:
(i) Trypsin
(ii) Amylase
(iii) Pepsin
(iv) Lipase
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.
(a) What are (i) organisms A, and (ii) substance B?
(b) What are (i) part C, and (ii) part D, of tooth known as?
(c) By what name are the holes E in the tooth known?
(d) Name the part F of the tooth.
(e) What will happen if organisms A reach part F of the tooth known?
Mention two ways in which the ileum of the mammal is adapted for the absorption of digested food.
Study the following dental formula and then answer the question that follow:
`"i" 3/4 "c" 0/0 "pm" 0/1 "m" 1/1`
State the total number of teeth present in the dentition.
Answer the following question.
Write two different ways in which glucose is oxidized to provide energy in the human body. Write the products formed in each case.
Given alongside is the diagram of the human alimentary canal.
(i) Name the parts 1-11 indicated by guidelines.
1.____ 2.____ 3.____ 4.____ 5.____ 6.____ 7.____ 8.____ 9.____ 10.___ 11.____
(ii) State the function of the juice secreted by the part 1.
(iii) State the function of the three enzymes found in the juice secreted by part 3.
Define the term ‘digestion’.
Name the types of teeth in human with functions.
State whether the following statements are True or false: Trypsin coagulates the milk protein.
Describe the following: Emulsification
The question has four options. Choose the correct answer:
Teeth present in the upper molar of human beings are
The coiled middle portion of the small intestine which is 2.5 meters long is the ______.
Mention the 3 important digestive glands in the process of digestion?
Explain the role of the mouth in digestion of food.
How do carbohydrates, proteins and fats get digested in human beings?
Given below from (i) to (iv) are some food items.
- Boiled and mashed potato
- Glucose solution
- A slice of bread
- Mustard oil
Which of the above will give a blue-black colour when tested with iodine?
______ is the vestigeal organ in human.
