1. Cellular Respiration

2. Word Wall: Cellular Respiration 1)Anaerobic 2)Aerobic 3)Cellular respiration 4)Glycolysis 5)Krebs Cycle 6)Electron Transport Chain 7)Fermentation 8)Lactic acid fermentation 9)Alcohol fermentation 10)Oxidative Phosphorylation 11)Cristae 12)Mitochondria 13)Cytoplasm

3. Cellular Respiration Overview Transformation of chemical energy in food into energy molecule ATP Occurs in the MITOCHONDRIA & CYTOPLASM of both animal and plant cells. Overall Reaction: C 6 H 12 O 6 + 6O 2 → 6CO 2 + 6H 2 O

5. Cellular Respiration Overview 2 Types of Cellular Respiration Anaerobic cellular respiration: NO OXYGEN REQUIRED Aerobic cellular respiration: NEEDS OXYGEN

6. Cellular Respiration Reactions Step #1: Glycolysis (ALWAYS!) ANAEROBIC: does not require Oxygen Series of reactions which break the 6-carbon glucose molecule down into two 3-carbon molecules called PYRUVATE (pyruvic acid) Occurs in the CYTOPLASM, near mitochondrion Makes 2 ATP per 1 glucose molecule Makes 2 NADH per 1 glucose molecule http://highered.mcgraw- hill.com/sites/0072507470/student_view0/chapter25/anima tion__how_glycolysis_works.htmlhttp://highered.mcgraw- hill.com/sites/0072507470/student_view0/chapter25/anima tion__how_glycolysis_works.html

8. After Glycolysis, If NO Oxygen is available, the cell will use… ANAEROBIC RESPIRATION aka Fermentation

9. Anaerobic Cellular Respiration No ATP made Makes NADH (carries electrons) to be used in Glycolysis. Fermentation: Lactic Acid (muscle cells) Alcohol: product is Ethanol (yeast, beer, bread)

10. After Glycolysis, If Oxygen is available, the cell will use… AEROBIC RESPIRATION aka Krebs Cycle & Electron Transport Chain

11. Aerobic Cellular Respiration 2 sets of reactions which occur in the MITOCHONDRIA 1. Kreb’s Cycle (aka Citric Acid Cycle) Occurs in the MATRIX (empty space in the mitochondria) 2. Electron Transport Chain Occurs in the CRISTAE of the mitochondria (inner membranes)

12. Krebs Cycle ETC

13. Kreb’s Cycle (Citric Acid Cycle) Completes the breakdown of glucose (C 6 H 12 O 6 ) Breaks down pyruvate from Glycolysis Produces Energy Molecules (NADH and FADH2) CO2 is released as waste Production of only 2 more ATP

15. Electron Transport Chain Energy Molecules ( NADH and FADH2) bring electrons from the Krebs Cycle Electrons travel from protein to protein in the CRISTAE membranes Oxygen is the FINAL ELECTRON ACCEPTOR picks up electrons and hydrogen: forms water Forms a total of 32 ATP

17. Energy Tally 36 ATP for Aerobic vs. 2 ATP for Anaerobic Glycolysis 2 ATP Kreb’s 2 ATP Electron Transport32 ATP 36 ATP http://www.youtube.com/watch?v=00jbG_cfGuQ

19. Videos http://www.youtube.com/watch?v=00jbG_c fGuQ Cell Respirationhttp://www.youtube.com/watch?v=00jbG_c fGuQ http://www.youtube.com/watch?v=sQK3Yr 4Sc_k Photosynthesishttp://www.youtube.com/watch?v=sQK3Yr 4Sc_k http://www.youtube.com/watch?v=3aZrkdz rd04 CR Songhttp://www.youtube.com/watch?v=3aZrkdz rd04

22. Cell Respiration Review 1.What are the reactants of CR? 2.What are the products of CR? 3.What type of organisms go through CR? 4.What is the first step of CR? Where does it occur? 5.What are the products of #4? 6.What do we call CR that does NOT involve Oxygen? 7.What are the 2 types of #5, and where do they occur?