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Transcript
Cellular Respiration Journal Entry 53 (1/20) What happens to food after you eat it? How do we turn the Biomolecules in our body into energy? Cellular Respiration Intro A. Background 1. During a Process called Cellular Respiration glucose is broken down and turned in to energy (ATP) Cellular Respiration Intro A. Background 2. Transforms the chemical energy (glucose) into usable energy in the form of (ATP). ATP Cellular Respiration Intro A. Background 3. ALL Organisms carryout this process! Cellular Respiration Intro B. The Equation C6H12O6 + 6O2 Glucose + Oxygen 6CO2 + 6H20 + ATP yields Carbon dioxide + water + energy Notice anything interesting? STOP AND THINK What is the purpose of cellular respiration? Cellular Respiration Intro ATP Review! Cellular Respiration Intro C. Energy Carriers Can store energy (energy empty) NAD+ FAD+ Can release energy (is carrying energy) NADH FADH2 STOP and THINK! How are ATP FADH2 and NADH similar? Glycolysis 1st step A. First step of Respiration B. Occurs in the Cytoplasm outside the mitochondria * Means to break glucose Glycolysis 1st step C. The Process of Glycolysis 1. Requires input of 2 ATP 2. Produces 2 NADH and 4ATP 4. 3. How Glucose many net split molecules into twoofmolecules ATP are produced of Pyruvate from (aka glycolysis Pyruvic Acid) STOP AND THINK What does the Glycolysis stage of cellular respiration accomplish? Glycolysis 1st step D. Glycolysis Summary 1. Pros a. Fast b. Requires no oxygen 2. Cons a. Small energy output b. Uses up all the NAD+ 3. Solution a. Send products other places to be processed Glycolysis 1st step E. Where do the products go? Aerobic Pathway (a) Glycolysis Anaerobic Pathway (n) Aerobic Pathway A. Main Goal: To slowly release energy from pyruvate in the presences of oxygen. Aerobic Pathway Stop and Think: Why does this process happen slowly Aerobic Pathway: Krebs Cycle (2a) 1.FACTS a. Krebs Cycle takes place in the Mitochondria b. Series of reactions that creates many products Aerobic: Krebs Cycle Pyruvate Glycolysis Energy ATP Products per pyruvate: 3NADH, 1ATP, 1FADH2, & 2 CO2 NETS per glucoses 6NADH, 2ATP, 2FADHWaste 2, & 4 CO2 STOP AND THINK What does the Krebs cycle stage of respiration accomplish? Aerobic: Electron Transport Chain (3a) 1. Facts a. All of the NADH and FADH2 give their electrons to the ETC to be turned into ATP b. Occurs Across mitochondria membrane Aerobic: Electron Transport Chain a. NADH and FADH2 drop off energy at the beginning of the chain NAD+ NADH Aerobic: Electron Transport Chain b. Oxygen is turned into water H2O O2 Aerobic: Electron Transport Chain c. The energy is converted into ATP Note: 1 NADH= 3 ATP 1 FADH2 = 2 ATP ATP ADP STOP AND THINK What does the ETC Stage of Cellular Respiration accomplish? Photosynthesis Energy Transformation Function Location Organisms Reactants (starting materials) Products Equation Respiration Comparison of Photosynthesis and Respiration Aerobic respiration totals