Presentation on theme: "Cellular Respiration Do Now : Why do we need to breathe?"— Presentation transcript:
1 Cellular RespirationDo Now : Why do we need to breathe?
2 Equation Reactants Products Oxygen + Glucose Carbon dioxide + Water + ATP2Reactants ProductsEnergy is released when glucose is broken down. CO2 is released as a waste gas.Which side is the reactants and which side is the products?
3 2 Kinds of Cellular Respiration Aerobic: Occurs in the presence of oxygenAnaerobic: Occurs when no oxygen is present.
4 Aerobic Respiration 3 stages Glycolysis Krebs cycle Electron Transport Chain
5 Glycolysis First stage in cellular respiration Only stage that does not require O2There is no net gain or loss of C because one 6-C molc (glucose) is broken into two 3-C mole (pyruvate) for a total of 6 Carbons.
6 Requires 2ATPs to start. End Product = 4 ATP Net Gain: 2 ATP One cell can produce thousands of ATP molecules in a few milliseconds!!!The net gain of ATP is small, but the cell can make many ATP in a very short period of time. And, because glycolysis does not require Oxygen, it can occur in anaerobic conditions.
7 REVIEW: What is the purpose of glycolysis? To break down glucose
8 Krebs Cycle CO2 is released as a waste gas Requires O2 Occurs in mitochondriaProduces 2 ATPs
9 Electron Transport Chain ADP is converted into ATPUp to 34 ATPs can be produced
10 Aerobic respiration yields a net total of 36-38 ATPs
11 Question:Which step of aerobic respiration produces the most ATPs (most efficient step)?ETC- Electron Transport Chain
12 Question :In what part of the cell aerobic respiration takes place?Mitochondria
13 • identify the organelle where this process occurs AIM : FermentationDo Now Discuss photosynthesis and explain its importance to an organism. In your answer, be sure to:• identify the organelle where this process occurs• identify two raw materials necessary for this process• identify one energy-rich molecule that is produced by this process• state how organisms use the energy-rich molecule that is produced• state how a gas produced by this process is recycled in nature
14 Fermentation Anaerobic process: occurs in absence of O2. Recycles NAD+ ,so that glycolysis can continue producing 2ATPs for every round.Does not produce any ATP
15 2 kinds of fermentation: Alcoholic FermentationLactic Acid Fermentation
16 Alcoholic Fermentation +2Ex: Yeast in BreadBread rises due to yeast fermentation. The alcohol produced evaporates when the bread is cooked.
17 Lactic Acid Fermentation +Produced in muscle cells during exercise when body is no longer able to supply O2 to cells.When exercising, it is important to maintain a constant breathing rate (and not hold your breath) because your body cells are supplied at a more constant rate with oxygen. This helps to limit the amount of lactic acid produced because cells are with oxygen longer.Some bacteria also produce lactic acid as a waste product during cellular respiration. Prokaryotic organisms are used to make cheese, yogurt, buttermilk, sour cream, pickles, and sauerkraut.