CELLULAR RESPIRATION
Review Photosynthesis
Autotrophs convert light energy into chemical energy• CO2 + H2O + light energy C6H12O6 + O2
How do we get energy?• From eating….unless you are a plant, right?• Not so fast…• Glucose (and other macromolecules) is not usable energy
for cells• Glucose must be converted to usable energy (ATP)
ATP
• Adenosine triphosphate• Molecule that is usable energy for cells• Energy is found in bonds between phosphate groups
Cellular Respiration
Process that converts glucose energy into ATP energy• Occurs in ALL living cells
Cellular Respiration Basics
Chemical process which occurs in the Mitochondria
C6H12O6 + O2 CO2 + H2O + ATP
Types of Cellular Respiration• Type 1: Aerobic Respiration
• Requires O2
• Type 2: Anaerobic Respiration• Does not require O2
Energy summary of Aerobic C.R.• Glycolysis: Start with Chemical Energy (Glucose)• Kreb’s Cycle: Convert to Usable Chemical Energy (many
ATP)• Electron Transport Chain: Make ATP and release Heat
Energy
Anaerobic Respiration• Much less efficient at converting
glucose to ATP• Occurs in 2 steps:
1. Glycolysis
2. Lactic Acid Fermentation (animals)
OR
Alcoholic Fermentation (plants)
Lactic Acid Fermentation• Animals
• Some bacteria, some fungus
• Lactic acid is produced• Why muscles are sore after a hard workout
Alcohol Fermentation• Plants
• Some bacteria, some fungus
• Ethanol, CO2 produced• How yeast makes bread rise• How alcoholic beverages are produced
Fermentation is useful
Audio/visual representations• Animation:
• http://www.sumanasinc.com/webcontent/animations/content/cellularrespiration.html
• Rap:• http://www.youtube.com/watch?v=VCpNk92uswY