Ch 9 Cellular Respiration and Fermentation
Download
Report
Transcript Ch 9 Cellular Respiration and Fermentation
1 Review Why do all organisms need food
Relate Cause and Effect Why do macromolecules
differ in the amount of energy they contain
2 Apply Concepts How does the process of cellular
respiration maintain homeostasis at the cellular level
Use Analogies How is the chemical energy in glucose
similar to money in a savings account
CH 9 CELLULAR RESPIRATION AND
FERMENTATION
9.1 Cellular Respiration: An Overview
Chemical Energy and Food
Why do you need food
It
provides the chemical building blocks they need to
grow and reproduce
It contains chemical energy that is released when its
chemical bonds are broken.
Calorie
Amount of energy needed to raise the
temperature of 1 gram of water by 1 degree
Celsius
1000 calories = 1 kilocalorie, or Calorie.
Cellular Respiration
Series of chemical reactions that breaks down
sugar and releases energy
Occurs in all living cells
Opposite of photosynthesis
Oxygen + Glucose Carbon dioxide + Water +
Energy
6 O2 + C6H12O6 6 CO2 + 6 H2O + Energy.
Cellular Respiration
This occurs in animals AND plants
This is the process that whenever your body needs
energy
In addition to sugar, fats and proteins may also be
used.
SIMILAR
Burn fuel
Produce heat
Produce H2O
Produce CO2
Produce energy
DIFFERENT
Cellular Respiration release
energy a little at a time
Controlled
Stages of Cellular Respiration
Glycolysis
Krebs cycle
Electron Transport
Chain (ETC).
Glycolysis
Produces only a small
amount of energy
Most energy (90%)
remains in the
chemical bonds.
Krebs Cycle
Produces only a small
amount of energy.
Electron Transport Chain (ETC)
Produces the bulk of
the energy
Uses oxygen.
Aerobic
Require oxygen
Krebb Cycle and ETC
Occurs in the
mitochondria.
Anaerobic
Does not need oxygen
Glycolysis
Occurs in cytoplasm.
Photosynthesis and Cellular Respiration
Opposite processes
Photosynthesis
“deposits” energy
Cellular respiration
“withdraws” energy.