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प्रश्न
What is digestion? Why do only animals require a digestive system?
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उत्तर
Digestion is the process of breaking down complex food materials into simpler substances by the action of enzymes.
Need for a digestive system:
(i) Large complex molecules like carbohydrates, proteins and lipids need to be broken down to simpler molecules. These simpler molecules can then be absorbed and utilized by the body.
(ii) The breaking down of complex food molecules into their simpler form is possible only through the process of digestion.
(iii) During digestion, large complex macromolecules present in food are converted into small simpler molecules, which can be simplified in different compartments of digestive system only.
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संबंधित प्रश्न
The inner wall of the small intestine has many finger-like outgrowths called ______.
Label the following figure of the digestive system.
A part of the human digestive system
Name any four life processes in living things.
Carbohydrates are bodybuilding nutrients.
Describe one way in which the small intestine is adapted for the absorption of digested food.
What harm can dental plaque do?
The inner lining of stomach is protected by one of the following from the harmful effect of hydrochloric acid. This is ______.
Which of the following is the correct sequence of parts as they occur in the human alimentary canal?
Write one function each of the following enzymes:
Pepsin
Write one function each of the following enzymes:
Lipase
Name the three enzymes found in pancreatic juice.
(i)____ (ii)____ (iii)_____
Fill in the blanks.
______ and ______ help in digestion but food does not pass through them.
Write true or false for the below statement. Rewrite the false statements correctly.
The wave-like motion of stomach muscles to push the food is called peristalsis.
Answer in detail.
What happens to the nutrients absorbed in the bloodstream from the small intestine?
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.
State whether the following statements are True or false: Enteropeptidase activates pepsinogen into pepsin.
Describe the process of digestion in human beings.
Identify the option that indicates the correct enzyme that is secreted in location A, B and C.
In which of the following groups of organisms, food material is broken down outside the body and absorbed?
Which part of the alimentary canal receives bile from the liver?
