How your cell get’s energy from the food you eat Cellular Respiration How your cell get’s energy from the food you eat

Why do we need energy?

Cellular Respiration

Where does cellular respiration occur in the cell

Adenosine triphosphate (ATP) Charged battery = ATP Uncharged battery = ADP

Where is the third phosphate group? Charged battery = ATP Uncharged battery = ADP

Cellular Respiration

Site of Cellular Respiration

Equation for Cellular Respiration Once again, Hank…

Phases of Cellular Respiration

Glycolysis- occurs with or without oxygen 6 carbon glucose breaks into 2- 3 Carbon Pyruvate Molecules Investment: - 2 ATP Produces: 2 Pyruvate molecules 2 Water molecules 4 ATP (Net of 2) 2 NADH + 2H+

or 6 carbon chain becomes 2 – 3 carbon chains 2 ATP net profit

Kreb’s Cycle- oxygen needed Pyruvate (3C) acetyl CoA (2C) before this cycle 2C molecule combines with another molecule to form a 6C molecule Carbon dioxide, NADH, FADH2 (electron carriers) is produced GTP

Taking it to the next level Don’t worry about knowing why everything happened in the cycle, but it is complex chemistry

Or… Purpose of Kreb’s cycle Shave off Carbon dioxide from the carbon chain Harvest hydrogens for the next stage off of the sugar molecule NADH FADH2

http://www.science.smith.edu/departments/Biology/Bio231/etc.html

All of the harvested hydrogens go to electron transport chain What are the two hydrogen carriers?

Electron Transport Chain Uses high energy electrons from glycolysis and Kreb’s cycle convert ADP into ATP NADH and FADH2 pass high energy electrons to the electron transport chain

Steps of the ETC Electrons from NADH and FADH2 are carried by the electron transport chain and a hydrogen is passed through into the intermembrane space Energy is generated by ETC will move H+ ions across the inner mitochondrial membrane to the intermembrane space At the end to ETC, an enzyme combines electron with Hydrogen ions and oxygen to form water Oxygen is the final electron acceptor Hydrogen ions are built up in the intermembrane space, making it more positively charged than the matrix ATP Synthase is within the inner mitochondrial membrane, as =each hydrogen ion goes through ATP Synthase, and enzyme will allow ADP to attach to a Phosphate to produce ATP Will Produce approximately 32 ATP

Or ETC is…. Bonding hydrogen with Oxygen to make Water NADH  3 ATP FADH2  2 ATP Makes most of the ATP in Cellular Respiration

http://highered. mcgraw- hill http://highered.mcgraw- hill.com/sites/0072507470/student_view0/ chapter25/animation__electron_transport_ system_and_atp_synthesis__quiz_1_.html

Questions for understanding Where does the oxygen go that we inhale? What happens to it?

Where does the carbon dioxide we inhale come from?

They hydrogen in the Electron Transport Chain, where are they from?

Fermentation- Anaerobic (without the presence of oxygen)

Energy Totals- per every glucose molecule Phase ATP Carbon Dioxide Electron Carriers Glycolysis 4 total, 2 Net Kreb’s Cycle 2 Net 6 8 NADH, 2 FADH2 Electron Transport Chain 32 Net Anaerobic Respiration- Fermentation

Fermentation