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Cellular Respiration

Explore the process of cellular respiration, from the splitting of glucose in Glycolysis to the stages of Aerobic and Anaerobic Respiration. Discover the importance of ATP, oxygen consumption, muscle fatigue, and energy sources for muscle contraction.

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Cellular Respiration

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  1. Cellular Respiration • The process by which living things release energy stored in organic molecules • Takes Place in 2 major stages • Glycolysis • Oxidative Respiration or Fermentation

  2. I. Glycolysis - The splitting of glucose into 2 three Carbon molecules called Pyruvate • Occurs in cytoplasm • 4 ATP produced but 2 are used in process • Does NOT require OXYGEN

  3. II. Anaerobic vs Aerobic A. Anaerobic (w/o O2) • Fermentation • Process by which pyruvate is converted into either alcohol and CO2 or lactic acid • Occurs in cytoplasm • Only 2 ATP are produced • NADNADH

  4. The 3 steps of cellular respiration are: • Glycolysis • The Krebs cycle • Electron Transport

  5. Each Cell uses between 1-2 billion ATP/min. • How many ATP’s are used each minute by all 100 trillion cells in the body? • 1 glucose = 686 Cal • 1 ATP = 7 Cal • How efficient is aerobic respiration? • 7x36= 252; 252\686 = 36% • Automobiles are only 25% efficient in converting chemical energy into mechanical energy?

  6. Muscle Fatigue • Inability of muscle to contract • Results from a deficit of ATP and/or accumulation of lactic acid  lowers pH

  7. Oxygen Consumption After Exercise After exercise, heavy breathing continues and oxygen consumption remains above the resting level Oxygen debt This added oxygen is used to restore muscle cells to the resting level in three ways 1) to convert lactic acid into glycogen 2) to synthesize creatine phosphate and ATP 3) to replace the oxygen removed from myoglobin

  8. Sources of Energy for contraction • Glycolysis 2 ATP • Lactic Acid Fermentation 2 ATP • Aerobic Respiration 36 ATP • Creatine Phosphate (5x more than ATP) (donates Phosphate to ADP  ATP) • Exercise Requirements: 10 min. taps glycogen for glucose • 10-30 min. Cells use either glucose or fatty acids (bloodstream) • Beyond 30 min.  fatty acids are primary source

  9. http://glencoe.mcgraw-hill.com/sites/0003292010/student_view0/chapter7/animations_and_videos.html#http://glencoe.mcgraw-hill.com/sites/0003292010/student_view0/chapter7/animations_and_videos.html# http://vimeo.com/10693405 http://www.bing.com/videos/watch/video/homeboyz-teach-cellular-respiration/c882c7d87d7442735123c882c7d87d7442735123-1513821241783?q=cell+respiration+animation&FROM=LKVR5&GT1=LKVR5&FORM=LKVR36 http://vcell.ndsu.nodak.edu/animations/etc/movie-flash.htm http://johnkyrk.com/krebs.html

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