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New From 2 Biology:Respiration Notes

Institution: Secondary

Course: Education

Content Category: Class Notes

Posted By: mikeGreen

Document Type: PDF

Number of Pages: 14

Price: KES 60
 
    

Views: 2061     Downloads: 15

Summary

Download new updated notes for form 2 biology, respiration from the new books approved by KICD.

RESPIRATION
? It is the process by which food substances are chemically broken down in all living cells to release energy, CO2, water or alcohol.
? It takes place in all living cells and involves a series of complex enzyme catalyzed reactions.
? NB- Respiration is a chemical process taking place inside tissue cells while gaseous exchange is a purely physical process which takes place at respiratory surfaces
? Respiration is also called tissue respiration or internal respiration

? SIGNIFICANCE OF RESPIRATION
? It provides energy which is obtained due to the break down of food. Foods which can provide lots of energy are carbohydrates (starch and glucose) and
fats.
? The energy derived from these food substances is used for activities such as muscular contraction, conduction of nerve impulses, secretion of enzymes,
growth etc.
? Tissue respiration takes place mainly in cell organelles called mitochondria.


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