The document discusses respiration, which is the process by which organisms release energy from food. Through the respiration reaction, glucose and oxygen are broken down to produce carbon dioxide, water, and energy. This energy is stored in ATP molecules within cells. There are two main types of respiration - aerobic respiration, which uses oxygen, and anaerobic respiration, which does not. Aerobic respiration produces much more ATP. Anaerobic respiration occurs in muscles during intense exercise when oxygen is limited.

1. Life Processes-Respiration
O2
ENERGY
The process of releasing energy from food is called respiration.

2. Respiration Reaction
• Glucose (C6H12O6) + Oxygen (O2) Water (H2O)+ CO2
+ Energy
• This reaction takes place inside the cells of the body.
• A lot of energy is produced by this process which is not used
all at once.
• This energy needs to be stored---ATP( Adenosine Tri
Phosphate)

3. TEST YOUR SELF
• What is respiration?
• Is respiration important for organisms? Why ?
• What word is spelled incorrectly in every
single dictionary?

4. How is energy stored and utilised when needed
• Adenosine Di Phosphate(ADP) + Pi + Energy ATP
• ADP and Pi are already present in the cell. Energy comes from
respiration

5. Types of Respiration
• Glycolysis is first and common
step for all types of respiration giving
2 ATP molecules.
It takes place in the cytoplasm of a cell.
• On the basis
of availability of oxygen:
• On the basis of products
formed, aerobic respiration:

6. TEST YOUR SELF
• What is the energy currency of the cell?
• What happens when ADP gets converted to
ATP?
• How many types of respiration are there?
• Name the first process in respiration. Does it
require oxygen?
• What is it that lives if it is fed, and dies if you
give it a drink?

7. Aerobic Respiration
• In the presence of Oxygen, Pyruvate enters Mitochondria.
• Pyruvate is a 3 carbon molecule, 2 pyruvate molecules are formed.
• A process called Krebs Cycle takes place in the cytoplasm.
• The result is formation of CO2 , H2O and 36+2 molecules of ATP.

8. Anaerobic Respiration
• In the absence of O2, Pyruvate remains in the cytoplasm.
• Fermentation of Pyruvate takes place to produce either lactic
acid(in muscles) or ethyl alcohol(in yeast) and just 2 molecules
of ATP.

11. TEST YOUR SELF
• What happens to pyruvate in the presence of
oxygen?
• Name the process that takes place in the
above condition.
• Why do we feel pain in our muscles after
rigorous exercise?
• How is the above mentioned process different
in yeast?
• What goes up but never ever comes down?

12. Respiration in Plants
• All parts of plants respire as there is little transport of
gases within the plant body.

13. Respiration in Animals

14. Respiration in Humans
• Breathing – Exchange of gases.
• Cellular Respiration

16. Human Respiratory Tract

17. • Do all cells use oxygen to produce energy?
• What is the other name of wind pipe?
• Where does exchange of gases takes place?
• Thoracic volume increases/decreases during
inhalation.
• What would happen if epiglottis is porous or absent
in our bodies?
• Why do skeletal muscles respire anaerobically
though they possess mitochondria?