1. Energy concentrated in wood Dispersed as heat Dispersed as light Dispersed as ashes Lecture 8 - Respiration

2. Energy dispersed as heat and light

3. glucose Energy = heat & light Stop iiiiiiTT! glucose RespirationBurning Energy = heat & ATP

4. Metabolism – all chemical reactions in cell Catabolism – breakdown of large to smaller molecules Anabolism – synthesis of larger molecules from smaller molecules

5. Anabolism Catabolism Monomers Polymer

6. From Saunders Publ. Cell has a constant need for energy (ATP)

7. From Saunders College Publishing High energy bond used to do work in cells A-P~P~P = ATP Adenosine triphosphate = ATP

8. Average adult human produces and utilizes her/his own body weight of ATP per day. Price of ATP from Sigma Chemical Company is $20.00 per gram For 70 kg (131) individual it would cost $1,400,000 to purchase that amount of ATP for one day’s worth of ATP

9. Cell has 1 second supply of ATP 10,000,000 ATPs used and made per second per cell

10. Cellular Respiration (Aerobic breakdown of glucose) Glucose, C 6 H 12 O 6 + O 2 CO 2 + H 2 O + 36 (net) ATPs + Heat

11. Respiration releases energy in chemical bonds in glucose Enough energy for 36 ATPs Glucose Now what??

12. A-P~P~P Breaking of the 3rd bond will liberate energy to do work in cells Energy

13. Respiration occurs in the mitochondrion Review

14. Oxidation and Reduction A.Oxidation – chemical reactions that give up electrons B.Reduction – chemical reactions that accept electrons Oxidation and Reduction Oxidation – chemical reactions that give up electrons Reduction – chemical reactions that accept electrons

15. Na Na+ e- Cl Cl - oxidized reduced (sodium) (chloride) Let me at him Oxidation and Reduction

16. Heat 90 o C 80 o C 70 o C 60 o C 50 o C Review 100 o C

17. (-) 4(-) 4H + O2O2 4(-)+O 2 4- 2H 2 O + Electron Transport System = Oxidation and Reduction Heat ATP 4 H atoms (from glucose) = 4 (+) and 4 (-) “Hot” “cool”

18. Heat 90 o C 80 o C 70 o C 60 o C 50 o C Review 100 o C

19. Lactic Acid Ethanol and CO 2 w/o O 2 In muscles Fermentation in yeast + O 2 Aerobic metabolism 36 ATPs Glucose Anaerobic metabolism – 2 ATPs