Cellular Respiration & Fermentation Chapter 8. Cell Respiration All organisms need energy from food. They obtain this energy through a process called.

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Presentation transcript:

Cellular Respiration & Fermentation Chapter 8

Cell Respiration All organisms need energy from food. They obtain this energy through a process called cellular respiration.

Remember ATP!!

THERE ARE 2 TYPES OF RESPIRATION!

Anaerobic Respiration(Fermentation) Uses NO OXYGEN and produces little energy from glucose – only 2ATP Starts with the process of GLYCOLYSIS in the CYTOPLASM C 6 H 12 O ATP  2 pyruvic acid + 4 ATP (start up energy)(3-C Compound)(gain of 2 ATP)

Pyruvic Acid Breakdown in Some Organisms Break it down into waste products to be excreted Bacteria/Yeast – break it down into alcohol and CO 2 Mammal Muscle Cells – turns into lactic acid BOTH PROCESSES MAKE 2 ATP in the ABSENCE of OXYGEN

PAUSE FOR A DEMONSTRATION!!

Aerobic Respiration Requires the presence of Oxygen Takes place in the mitochondria COMPLETELY breaks down glucose molecule to generate large amounts of energy (36 ATP)

2 Processes Involved in Aerobic Respiration Krebs (Citric Acid) Cycle Electron Transport Chain

Steps: First, Glycolysis occurs (in the cytoplasm) generating 2 Pyruvic Acids and 2 ATP Next, Oxygen is used to completely breakdown the pyruvic acid and make CO 2 and H 2 O as wastes and 34 more ATP As you can see this is MUCH more efficient than anaerobic respiration, WHY?