Cellular Respiration

Food to energy in 3 steps!

Mitochondria

Electron Carriers0A Hydrogen has 1 electron and 1 proton0Gaining a hydrogen means gaining

electrons and protons0NAD. NADH0FAD. FADH20These can be reused

Why do we need oxygen?

0Aerobic=with oxygen0An=without0Anaerobic=without oxygen

0Our body needs oxygen to produce large amounts of ATP

Cellular Respiration

0Three steps0Glycolysis0Krebs cycle (citric acid cycle)0Electron transport chain

Glycolysis0Located in cytoplasm of cell0Input: 1 molecule of Glucose0Product: 2 Pyruvate02 ATP0Overview: 1 molecule of Glucose is

broken down into 2 Pyruvate molecules. No Oxygen is needed for Glycolysis to occur.

Krebs Cycle0Located: Matrix of Mitochondria0Input: 2 Pyruvate, NAD, FAD0Output: 6 CO2, NADH, FADH20Produces 2 ATP0Overview: the 2 Pyruvate are changed

into Acetyl COA before entering the Krebs Cycle. The Acetyl is changed into Citric Acid. Electron carriers pick up the extra Hydrogen atoms as the molecule is broken down and moves toward the ETC.

Electron Transport Chain0Located in the inner membrane (Christae) of the

mitochondria 0Input: NADH, FADH2, O20Output: NAD, FAD, H2O0Produces 34 ATP0Overview: the electron carriers donate the hydrogen into

enzymes located in the membrane. The electrons move into the membrane while the protons are pushed through the membrane. At the end of the chain the protons push back through an enzyme which powers phosphate to attach to ADP to make ATP.

Cellular Respiration Equation

0C6H12O6+O2. H2O+ATP