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

We eat more than carbohydrates…

Audio/visual representations• Animation:

• http://www.sumanasinc.com/webcontent/animations/content/cellularrespiration.html

• Rap:• http://www.youtube.com/watch?v=VCpNk92uswY