Transcript Chapter 7
Chapter 7 Cellular Respiration “Breath” The Card II – Cellular Respiration Heterotrophs Food C6H12O6 + 6O2 6CO2+ 6H2O+ Energy (ATP) Heterotrophs need food to live, they convert that food into usable energy (glucose) for the cell to make ATP Cellular Respiration Molecules on the earth are all recycled and reused. ATP- adenosine triphosphate is an energy storing molecule. it has three parts: ribosome (5 carbon sugar, adenine, and 3 phosphates) all cells must have this to stay alive! Cellular Respiration ADP – adenosine diphosphate, which is ATP with one phosphate missing. It is lower in energy than ATP but needed in the process for making energy in the cell Energy cycles from ATP to ADP back to ATP. In this way no energy is ever lost. Action: ATP Cycle in Cells ATP Energy from Food Energy for cells ADP Cellular Respiration Heterotrophs- organisms that can not make their own food (animals) these organisms need to rely on food for the making of energy (ATP) use oxygen and the molecules in food to make the food Cellular Respiration Cellular respiration – process of energy making in a cell involving the mitochondria, glycolysis, Krebs cycle, and electron transport system. Glycolysis - where glucose is converted to pyruvate and energy (small amount) is released. Cellular Respiration Krebs cycle – breaks down acetyl CoA to form CO2, ATP, NaDH, FaDPH2 Coenzyme A NAD Acetyl CoA Citric Acid FAD Citric Acid Cycle = 2ATP Pyruvate oxaloacetic acid Fumaric Acid Succinic Acid 2X Citric Acid ATG Cellular Respiration Electron transport chain/system – energy transfer that makes 32 ATP molecules - made when H+ is released - NADH NAD - FADH2 FAD - takes place in the inner membrane of the mitochondria Cellular Respiration Fermentation – happens when there is no O2 present Pyruvate Alcohol (no O2 present) +NADH Ethanol + NAD+ = CO2 (runner’s high) NADH Latic Acid + NAD+ (muscle pain!) Cellular Respiration Calorie – amount of heat energy needed to raise the temperature of one gram of water one degree Celsius. Aerobic - reactions that require O2 Anaerobic – reactions that happen without O2 Quiz 10 Cellular Respiration 1. What organelle of the cell directs and carries out cellular respiration? 2. What is the end result of cellular respiration in the cell? 3. What happens if there is no oxygen present for the cells to finish cellular respiration? 4. How many ATP are produced at the end of the cycle?