1. Organisms obtain energy from food 2. Glucose is main source of food for cells 3. Cells break chemical bonds of glucose; energy released 4. Energy is stored in ATP 5. Making ATP is part of cellular respiration Slide # 2 Go to Section: Cells Need Energy
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Cells Need Energystaff.katyisd.org/sites/1401049/PublishingImages/Pages/Unit-3-Cellular-Energy... · Cells Need Energy. Respiration. Cellular Respiration If cellular respiration took
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1. Organisms obtain energy from food
2. Glucose is main source of food for cells
3. Cells break chemical bonds of glucose; energy released
4. Energy is stored in ATP
5. Making ATP is part of cellular respiration
Slide # 2
Go to
Section:
Cells Need Energy
Respiration
Cellular Respiration
If cellular respiration took place in just one
step:
All of the energy would be released at once
Most would be lost in the form of light and heat.
Instead, a living cell has to release chemical
energy in food molecules a little bit at a time.
Must trap those little bits of energy by using
them to make ATP.
Cellular Respiration
Cellular Respiration - Process that
releases energy by breaking down
glucose and other food molecules in
the presence of oxygen
Cellular Respiration
Requires (Reactants):
1. Glucose
2. Oxygen
Gives Off (Products):
1. Water
2. Carbon Dioxide
3. Energy
3 Stages of Cellular
Respiration
1. Glycolysis
2. Krebs Cycle
3. Electron Transport Chain
Each stage captures some of the chemical energy available in food molecules and uses it to produce ATP.