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संबंधित प्रश्न
Which part of the digestive canal is involved in:
Chewing of food ______.
Which part of the body secretes bile?
| When a person puts food in his mouth, then teeth cut it into small pieces, chew and grind it. The glands A in the mouth secrete a substance B which is mixed with the food by tongue. The substance B contains an enzyme C which starts the digestion of food in the mouth. The slightly digested food from the mouth goes down a tube D. The special type of movements E in the walls of tube D push the food into stomach for further digestion. The stomach wall secretes gastric juice containing three substance F, G and H. One of the functions of F is to kill bacteria which may enter the stomach with food. The substance G protects the inside layer of stomach from the damaging effect of substance F whereas substance H is and enzyme for digestion. The partially digested food then enters into small intestine for further digestion. |
- What are (i) gland A, (ii) substance B, and (iii) enzyme C?
- Name the tube D.
- What is the movement E known as?
- What are (i) F, (ii) G, and (iii) H?
Study the diagram given below and then answer the question that follows:
Name the parts labelled 1, 2, 3, 4, 5 and 6.
Write the function of the following in the human alimentary canal:
HCl in stomach
Write four sequential steps of the procedure of the experiment "Preparing a temporary mount of a leaf peel to show stomata".
Identify and name the four type of teeth shown below and give their functions
Fill in the blanks in the table (1-5) by selecting the suitable names of substances from the list given below:
(steapsin, peptones, fatty acids, proteoses, protein).
| Digestive Enzymes | Acts on | To convert into |
| (i) Pepsin | _________(2) | ________(3) and |
| (ii) _______(1) | Fats |
________(4) _________(5) |
Name the digestive juice secreted by the stomach and give its function.
State one difference in nutrition: Parasite and Saprophyte
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.
Mark odd one in the series:
The question has four options. Choose the correct answer:
Teeth present in the upper molar of human beings are
Use your brain power!
Why do we sometimes choke suddenly while eating?
All are functions of the liver, EXCEPT
Identify the labels i, ii, iii, and iv in the given diagram of tooth anatomy.
Observe the diagram of Human digestive system.
Match the labeling referred in column I and correlate with the function in column II.
| Column I | Column II | |
| i. | a. | The length of this depends on food the organism eats. |
| ii. | b. | Initial phase of starch digestion |
| iii. | c. | Increase the efficiency of lipase enzyme action |
| iv. | d. | This is the site of the complete digestion of carbohydrates, proteins and fats. |
Salivary glands secrete ______.
The enzymes present in the saliva convert ______.
Write the chemical name and Molecular formula of tooth enamel.
