1 / 20

Cellular Respiration 1.18

Cellular Respiration 1.18. Quick Review Autotrophs produce glucose via photosynthesis How do consumers acquire glucose?. Cellular Respiration. http:// www.ehow.com/video_4984772_what-cellular-respiration.html. Cellular Respiration. Once the glucose is consumed, how can our cells use it?

valin
Télécharger la présentation

Cellular Respiration 1.18

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Cellular Respiration 1.18 • Quick Review • Autotrophs produce glucose via photosynthesis • How do consumers acquire glucose?

  2. Cellular Respiration • http://www.ehow.com/video_4984772_what-cellular-respiration.html

  3. Cellular Respiration • Once the glucose is consumed, how can our cells use it? • CELLULAR RESPIRATION • Basically means converting our stored energy (glucose) into energy the cells can use. • *Conservation of Energy*

  4. What is this new form of Energy? • ATP • Adenosine Triphosphate • What are the two ways to create ATP?

  5. 1) Aerobic Respiration • “Aero” Greek root word for air; using oxygen. • If we intake enough oxygen, cellular respiration follows the aerobic pathway and leads to lots of ATP formation. • This is healthy and efficient!

  6. Aerobic Respiration • This pathway (with oxygen) has two stages. • First Stage: Glycolysis • Enzymes are used to break down one glucose molecule into two pyruvate molecules

  7. Aerobic Respiration Glucose  Glycolysis  Pyruvate C6H12O6  2C3H6O3 2ADP + 2Pi  2ATP • This process stores energy so it’s an endergonic reaction

  8. Aerobic Respiration • What happens next? • Well, the pyruvate then enters the mitochondria (powerhouse) • Exergonic reactions take place and release energy. • Remember oxygen is involved, so pyruvate is broken down into CO2 and H2O

  9. Aerobic Respiration • Congratulations, we’ve covered the concept of the Krebs’ Cycle! • Hans Krebs discovered these oxidative respiration reactions • On the next slide is the overall reaction for Oxidative Respiration

  10. Oxidative Respiration • Second Stage • This is when pyruvate is broken down into carbon dioxide and water (in mito.) Pyruvate + oxygen  O.R.  CO2 + H2O 2C3H6O3 + 6O2  6CO2 + 6H2O 34 ADP + 34Pi  34 ATP

  11. Aerobic Respiration • Review C6H12O6 + 6O2glycolysis then O.R.  6CO2 + 6H2O 34 ADP + 34Pi  34 ATP • Note: the equations are chemically balanced. *Conservation of Mass*

  12. Aerobic Respiration • http://www.youtube.com/watch?v=DyrUbsyBjfQ • http://www.youtube.com/watch?v=TgJt4KgKQJI&feature=related • (mitochondria video) • Site of oxidative respiration

  13. 2) Anaerobic Respiration • “An”aero meaning lack of air • If there is not enough oxygen, cells can still produce ATP for energy • Just not as efficient… • Two other products can be formed.

  14. Ethanol Fermentation • First product occurs in plants (yeast) • Glucose broken into pyruvate by glycolysis • Pyruvate decarboxylase (enzyme) converts a CO2 into ethanol (alcohol). glycolysis Glucose2 pyruvate CO2 + 2 ethanol 2ADP  2ATP

  15. Ethanol Fermentation • http://www.youtube.com/watch?v=-nIDGG0sYcg&NR=1

  16. Application • Breads, pastries, wine and other alcoholic drinks use ethanol fermentation • CO2 gas is released, causes bubbles and rising of the ingredients.

  17. Lactate (lactic acid) Fermentation • Second type of product • Remember: Anaerobic respiration, so the muscle cells are using energy faster than we can supply oxygen. • Again glucose is broken into pyruvate via glycolysis.

  18. Lactate (lactic acid) Fermentation • Lactate dehydrogenase (Enzyme) converts the two pyruvates into two lactate molecules. glycolysis Glucose  2 pyruvate and 2 lactates 2ADP 2ATP • Lactate causes stiff muscles, we “pant” to get rid of the “oxygen debt”.

  19. Make the Connection… • Recall Photosynthesis • Think of the reactants and products for photosynthesis and cellular respiration… • Is there a connection? • Think Pair Share with someone close by, come up with one sentence to connect the two processes.

  20. Make the Connection…

More Related