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प्रश्न
The question has four options. Choose the correct answer:
The number of teeth that grow only once in human is
विकल्प
4
12
20
28
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उत्तर
4
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संबंधित प्रश्न
What is the location and function of the villi?
Why do we get instant energy from glucose?
What is the other same of food pipe?
Draw a labelled diagram of the human digestive system. With the help of this diagram, describe the process of digestion of food in man (humans).
In human digestive system, the enzymes pepsin and trypsin are secreted respectively by:
(a) pancreas and liver
(b) stomach and salivary glands
(c) pancreas and gall bladder
(d) stomach and pancreas
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.
(a) What is (i) gland A (ii) substance B, and (iii) enzyme C?
(b) Name the tube D.
(c) What is the movement E known as?
(d) What are (i) F (ii) G, and (iii) H?
Why is there a difference in the rate of breathing between aquatic organisms and terrestrial organisms? Explain.
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) |
Differentiate between.
Mechanical digestion and Chemical digestion
Identify which three of the following terminologies is true for human dentition.
