Cellular Respiration Cellular Respiration is the process that

Cellular Respiration

Cellular Respiration is the process that releases energy by breaking down food molecules in the presence of oxygen. This occurs in the mitochondria. 6 O 2 + C 6 H 12 O 6 6 CO 2 + 6 H 2 O + Energy Oxygen + Glucose Carbon Dioxide + Water + Energy

You Write: Cellular respiration- release energy by breaking down food in the presence of oxygen. 6 O 2 + C 6 H 12 O 6 6 CO 2 + 6 H 2 O + Energy (oxygen + glucose carbon dioxide +water+energy) So what is the purpose of cellular respiration?

Cellular Respiration

Glycolysis is the process in which one molecule of glucose is broken in half, producing two molecules of pyruvic acid. 2 ATP needed to start reaction, 4 ATP are produced thus the net gain is 2 ATP.

You write: Glycolysis is the process of splitting 1 glucose molecule to form 2 pyruvic acids, releasing 2 ATP.

Fermentation Releases energy from glucose without the presence of oxygen—allows glycolysis to continue to supply ATP. There are two types of fermentation: alcoholic and lactic acid. Alcoholic fermentation --yeasts and some microorganisms. -- produces alcohol & Carbon Dioxide Lactic Acid -- produced by muscles during rapid exercise when the body cannot supply enough oxygen.

You write: Fermentation allows glycolysis to continue when there is no oxygen. This is called anaerobic respiration. The two types are – alcoholic fermentation(yeast) – Lactic acid fermentation (animals)

The Krebs Cycle If oxygen is present-pyruvic acid is broken down into carbon dioxide and makes ATP. Citric Acid is created in this cycle giving it the nickname Citric Acid cycle. Net ATP Production is 2 ATP.

You write: Krebs cycle—pyruvic acid is broken down to produce 2 ATP when oxygen is present. CO 2 is released.

Electron Transport Chain The electron transport chain uses the high-energy electrons from the Krebs Cycle to convert ADP to ATP. Total ATP 32.

You write: Electron transport chain releases 32 ATP using electrons from the Krebs cycle.

--2 ATP --32 ATP

Totals Gycolysis 2 ATP Krebs Cycle 2 ATP Electron Transport Chain 32 ATP Total = 36 ATP

So, what is ATP

Energy & Exercise Quick energy – Lactic Acid fermentation is used to get quick energy and gives off lactic acid as a by-product, thus the muscle pain. Long-Term Energy – Use cellular respiration to produce energy. Exercising or activities that last for at least 15 to 20 minutes. Best form for weight control.

Comparing Photosynthesis & Respiration Photosynthesis Cellular Respiration Function Energy Storage Location Chloroplasts Energy Release Mitochondria Reactants CO 2 and H 2 O Products C 6 H 12 O 6 and O 2 CO 2 and H 2 O Equation 6 CO 2 + 6 H 2 O C 6 H 12 O 6 + 6 O 2 6 CO 2 + 6 H 2 O

Your turn…. 1. In your own words, what is cellular respiration? 2. Compare and contrast the equation for cellular respiration and the equation for photosynthesis. 3. Of plants and animals, which ones undergo cellular respiration and which ones photosynthesize?