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7th Grade Life Science Mr. Fisk Chapter 3 – Chemical Compounds in Cells Engage – Count the number of times you breath in 1 minute. Objectives: 1. Describe the events that occur during respiration. 2. Tell what fermentation is. 3-4 - Respiration A. What is Respiration? 1. Respiration – process by which cells obtain energy from glucose. Sugar → Energy 2. Storing and Releasing Energy. Cells store food – like money in a savings account. 3-4 Page 1 of 4 7th Grade Life Science Mr. Fisk 3. Breathing and Respiration . Breathing – moving air in and out of your lungs. Respiration – occurs in cells. 4. 2 Stages of Respiration Stage 1 – occurs in the Cytoplasm – glucose molecules broken down into smaller molecules. Stage 2 – occurs in the Mitochondria – glucose combine with O2 to produce Energy. 5. Respiration Equation C6H12O6 + 6O2 3-4 →6CO2 + 6H2O + Energy Page 2 of 4 7th Grade Life Science Mr. Fisk 6. Comparing Photosynthesis and Respiration 3-4 Page 3 of 4 7th Grade Life Science Mr. Fisk B. Fermentation . 1. Fermentation – energy releasing process that does not require O2. Single – celled organism deep in the ocean or in the mud of lakes etc. 1 molecule of glucose produces much less energy. 2. Alcoholic Fermentation Yeast break down sugar Alcoholic – Produce Glucose→ Alcohol + ATP + CO2 3. Lactic Acid Fermentation Oxygen debt situation – running up a hill etc. – body cannot get enough oxygen. Glucose → Lactic Acid + ATP = CO2 3-4 Page 4 of 4