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प्रश्न
What substances are contained in gastric juice? What are their functions?
उत्तर
The gastric juice contains hydrochloric acid, pepsin enzyme and mucus. Their functions are as follows:-
1) Hydrochloric acid: It creates an acidic environment for the action of pepsin as well as kills the bacteria present in the food.
2) Pepsin: It begins the digestion of proteins into smaller molecules.
3) Mucus: It protects the stomach wall from hydrochloric acid.
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संबंधित प्रश्न
The process of digestion of food in humans begins in:
(a) stomach
(b) food pipe
(c) mouth
(d) small intestine
Where are proteins first digested in the alimentary canal?
(a) small intestine
(b) oesophagus
(c) mouth
(d) stomach
Fill in the blanks.
Grinding of food is brought about by _______ and ______
Write short answers
Define homodont dentition.
Observe the diagram given alongside and answer the following:
- Name the parts numbered 1-8.
- Which parts shown in the diagram are non-living?
- Is the tooth suited for cutting, tearing or grinding?
- What is the function of parts 8 and 7?
- What is the total number of teeth present in adult human beings?
- Write the dental formula of human beings.
Describe the following: Digestion of fat in the intestine
Mark odd one in the series:
What makes respiration and blood circulation go on all the time, and the processes of digestion happen at the right time?
Which part of the alimentary canal receives bile from the liver?
In human beings, when the process of digestion is completed, the (i) proteins, (ii) carbohydrates and (iii) fats are respectively finally converted into ______.
