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प्रश्न
Define with examples: Autotrophs
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उत्तर
These are the organisms which prepare organic food in their body from simple inorganic materials like carbon dioxide, water, etc.
Example - green plants and certain protests.
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संबंधित प्रश्न
Match the items of Column I with suitable items in Column II.
| Column I | Column II | ||
| (a) | Salivary gland | (i) | Bile juice secretion |
| (b) | Stomach | (ii) | Storage of undigested food |
| (c) | Liver | (iii) | Saliva secretion |
| (d) | Rectum | (iv) | Acid release |
| (e) | Small intestine | (v) | Digestion is completed |
| (f) | Large intestine | (vi) | Absorption of water |
| (vii) | Release of faeces |
The first enzyme to mix with food in the digestive tract is ______.
| 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?
What are the end products of the digestion of: starch, proteins and fats respectively?
The stomach secretes gastric juice, which contains hydrochloric acid. What is its function?
Put a tick (✓) against the most appropriate alternative in the following statement.
The teeth which help in tearing the food are the:
Fill in the blank.
Molars are meant for _____ the food.
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.
What do you mean by the absorption of food?
Define the following term:
assimilation
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.
Complete the following enzymatic reaction.
Sucrose \[\ce{->[sucrase]}\] ___________+ __________
Answer in detail.
Liver does not secrete any enzymes yet it helps indigestion. How?
Correct the spellings: Disegion
The question has four options. Choose the correct answer:
The dental formula of human beings is
The question has four options. Choose the correct answer:
The number of teeth that grow only once in human is
What makes respiration and blood circulation go on all the time, and the processes of digestion happen at the right time?
The passage of food into the stomach is controlled by the ______.
How does tooth enamel get corroded? What is the preventive measure for this?
