Topic 3

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1
What is Cellular Respiration?
Breaking down glucose to create energy from ATP
2
What is the Essential Purpose of Cellular Respiration?
To make ATP from ADP and inorganic phosphate (Pi)

To make energy bitch
3
What is the net reaction of Cellular Respiration?
C6H12O6 + 6O2 --> 6H2O + 6CO2 + 36 ATP
4
Where is chemical energy stored?
In the bonds of molecules. As bonds break, energy is released.
5
What is ATP used for?
-Basic energy currency of the cell
-Used to transfer energy
-Provides energy for protein syntheses and muscle contraction
6
Aerobic Respiration
-Occurs in the precense of O2
-Begins in the cytoplasm and ends in the Mitochondria
7
Anaerobic Respiration
-Occurs without O2
-Stays in the cytoplasm and only produces 2 ATP
8
What is ATP made of?
5 carbon sugar
Nitrogen base
3 phosphate molecules

AMP -> ADP -> ATP
9
Mitochondria
-Powerhouse of the cell, produces large quantities of ATP
-Outer membrane and Inner Membrane
Contain their own DNA (MTDNA) and can reproduce itself
10
Glycoloysis
-Stage 1 of both Aerobic & Anaerobic Respiration
-Is a series of 10 chemical reactions
-Breaks glucose into two small molecules called pyruvate
-Does not require oxygen
-2 NAD react with hydrogen ions and become NADH
-Energy builds up and releases as 4 ATP (including net gain)
-Occurs in the cytoplasm
11
Pyruvate Oxidation
-Stage 2
-Occurs in the Matrix
1. A CO2 molecule is removed from each pyruvate and released as a waste product.
2. Carbon portions are oxidized and become NADH
3. Coenzyme A forms Acetyl-CoA
12
Krebs Cycle
-Stage 3
Each acetyl CoA produces
-2 CO2 Molecules
-3 NADH
-1 FADH2
-1 ATP

NADH and FADH2 enter stage four, while CO2 is excreted
13
Electron Transport
-Stage 4
-NADH and FADH2 transfer electrons
-Oxygen is vital
-Large emounts of energy are released and used to pump H+ ions across the intermembrane space
-Flow through ATP Synthase to product ATP
-32 ATP molecules are produced in Stage 4
14
Alcohol Fermentation
-In yeast and other organisms, anaerobic resp produces ALCOHOL and CO2
-Pyruvate is converted
-NADH reduces the converted Pyruvate into Alcohol
-Recycles NAD+ which helps continue glycolysis
15
Lactic Acid Fermentation
-During hard excersize, muscles demand more energy
-In animal cells, glucose is broken down producting Lactic Acid and 2 ATP w/o O2
-Recycles NAD+
-Lactic acid causes the burning sensation, stiffness, and fatigue in muscles after excersize
16
Lactic Acid Threshold
How much exertion can your body handle until lactic acid production spikes.
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