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Transcript
CHAPTER 5
CELLULAR RESPIRATION
P.129-142
DEFINITION


DECOMPOSITION
PATHWAY THAT
PROVIDES THE
ENERGY (ATP) CELLS
NEED TO FUNCTION
2 TYPES (SEE P.1 OF
PACKET)
 AEROBIC
 ANNAEROBIC
AEROBIC




IN THE PRESENCE OF OXYGEN
(GLYCOLYSIS, KREBS CYCLE,
ELECTRON TRANSPORT SYSTEM
OR ETS)
GLUCOSE IS TRANSPORTED BY
THE BLOODSTREAM TO OUR
CELLS
THE HORMONE ADRENALINE
HELPS TO BREAK GLYCOGEN
INTO GLUCOSE
GLUCOSE + OXYGEN 
CARBON DIOXIDE + WATER +
ENERGY (ATP)
ANAEROBIC



WITHOUT OXYGEN,
GLYCOLYSIS AND
FERMENTATION
ALCOHOL SUCH AS IN
WINE
LACTIC ACID/LACTATE
IN MUSCLES WHEN
THERE IS INSUFFICIENT
OXYGEN
3 MAIN STAGES OF
AEROBIC RESPIRATION
1.
2.
3.
Glycolysis
Krebs Cycle
Electron Transport
Chain
GLYCOLYSIS




OCCURS IN CYTOPLASM
(CYTOSOL)
GLUCOSE BROKEN DOWN INTO
2 PYRUVATE (PYRUVIC ACID)
2 MOLECULES OF NADH ARE
FORMED (FROM NAD+)
2 MOLECULES OF ATP ARE
FORMED (4 PRODUCED MINUS
2 USED TO START THE PROCESS)
KREBS CYCLE






TAKES PLACE IN
MITOCHONDRIAL MATRIX
DEALS WITH BREAKDOWN OF
GLUCOSE INTO CARBON
SKELETONS
1 MOLECULE OF GLUCOSE
FORMS 2 PYRUVATE (PYRUVIC
ACID) THROUGH GLYCOLYSIS
PYRUVATE FORMS ACETYL CO-A
TO START THE PROCESS
PRODUCTS PRODUCED:

4CO2 , 6 NADH , 2 FADH2 , AND 2
ATP
ELECTRON TRANSPORT SYSTEM

TAKES PLACE IN THE CRISTAE OR INNER
MEMBRANE OF THE MITOCHONDRIA
3 MAIN STEPS IN THE PROCESS
1. NADH AND FADH2 (FROM GLYCOLYSIS AND THE
KREBS CYCLE) DONATE ELECTRONS AND H+ WHICH
COMBINE WITH OXYGEN TO FORM WATER
2. ENERGY FROM THE ELECTRONS POWERS THE ACTIVE
TRANSPORT OF H+ OUT OF THE MEMBRANE
3. WHEN H+ DIFFUSE BACK IN THROUGH ATP
SYNTHASE, ATP IS PRODUCED (34 TOTAL)
 EACH NADH MOLECULE CAN
DRIVE THE SYNTHESIS OF
UP TO 3 ATP
 EACH FADH2 MOLECULE
CAN DRIVE THE
SYNTHESIS OF UP TO
2 ATP