Gaseous Exchange


 
 
Concept Explanation
 

Gaseous Exchange

Gaseous Exchange:

Respiration and Gaseous Exchange in Animals: We know that animals obtain energy from food they eat. Before the energy can be used by the cells of the body, it must be released from the chemicals of the food by respiration. We have seen that aerobic respiration needs a supply of oxygen to breakdown the food which releases energy. During respiration animal cells produce carbon dioxide as a waste product. All cells, therefore, must be supplied oxygen and must be able to get rid of carbon dioxide.                                                                                 

To show  that Carbon dioxide is released During Exhalation:

Carbon dioxide reacts with lime water to make calcium carbonate. This property is utilized to show the evolution of carbon dioxide during respiration. For this, take a test tube and pour some lime water in  it. Dip a drinking straw in the test tube. Blow air in the lime water turns milky. This shows that carbon dioxide is released during exhalation.    

                                                

Sample Questions
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Question : 1

The actual site of gaseous exchange in respiratory system is

Right Option : C
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Question : 2

Gaseous exchange in plants take place through ________ and ___________ .

Right Option : A
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Explanation
Question : 3

Gasecous exchange in plants occurs through ____________and____________.

Right Option : B
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Explanation
 
 


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