Respiration

ALL ORGANISMS CARRY ON SOME FORM OF CELLULAR

RESPIRATION

Cellular respiration

• Chemical reactions that release the energy found in food.

• The main food used for energy is GLUCOSE

• The glucose molecule is taken apart, which means the chemical bonds are broken.

• Glucose looks like:

• The chemical bonds that hold the molecule together hold energy.

• When those bonds are broken the energy is released.

• Cellular respiration breaks those chemical bonds

The release of energy cannot occur all atonce. Too much heat would be released insideyour cells. Instead, the release of energy occursin a series of enzyme-controlled smallsteps. The energy stored in glucose is convertedinto a usable form, the energy source ofall cells, adenosine triphosphate, or ATP.

• The energy that is released from glucose is stored in molecules of ATP.

• ATP – adenosine triphosphate

• ATP has three phosphate groups. When those phosphate groups are bonded together they hold a lot of energy!!!!!

• The process begins with ADP (adenosine diphosphate)

When energy is released from glucose it is used to add a third phosphate group to ADP, forming a high energy bond that stores energy for use by the organism.

Draw this reaction

Energy is storedADP + P ATPEnergy is released

Mitochondria-Organelle where cellular

respiration occurs

• What activities do humans need ATP molecules for?

Equation for cellular respiration:

C6H12O6 + O2 CO2 + H2O + 36ATP

Raw materials = Glucose and oxygenEnergy source= ATPProducts= carbon dioxide + Water + Energy (ATP)* ATP is needed to fuel the reaction and ATP is produced also

Cellular respiration that occurs without oxygen is called fermentation

Fermentation is used to make alcoholic beverages, cheeses and yogurts and in baking