Energy Systems

Yeilds enormus amounts of ATP

ADP releases kinase. Kinase breaks down the fuel source (Phosphocreatine) which releases energy

Has small amounts of stored energy

Stored ATP in the muscle breaks down which forms energy
ADP + P = ATP - ATP is the byproduct

When there is large amounts of energy, the body releases creatine kinase which then breaks down phosphocreatine which then releases energy

Creatine phosphate resynthesizes ATP which is where is generates from

Does not produce lactic acid

Produces glucose (food source)

Glucose breaks down to provide energy in ATP (yeilds 2)

Yields twice as much ATP as the ATP-PC pathway

Produces ATP without oxygen

Energy from glucose rejoins phosphate to ADP through chemical reactions

byproducts are ATP, pyruvate and NADH

glycogen gets depleated

occurs in the cytoplasm

The first Sequence of reactions

Fats, proteins and carbohydrates are used

Preferred pathway after 90 seconds

Needs the complete breakdown of glucose

Uses a lot of ATP

yeilds 36 ATP

slow process which needs a lot of oxygen

water and CO2 is a byproduct

Involves three separate pathways

1) Glycolysis

-Enzymes split a molecule of glucose into two molecules of pyruvate, that then releases energy which is transferred to ATP.
-when oxygen is present pyruvic acid is converted to acetyl CoA instead of lactic acid

Limitations

--the energy yield during the process is very low when compared to the energy that is utilized

2) The Krebs Cycle

-Has eight reactions
-Has 2 molecules of ATP
-Complete cycle of reactions occur
-Citric acid is formed

Limitations

-Hydrogen peroxide limits the Krebs Cycle, which can limit the production of NADH

3) The Electron Transport Chain

-Yeilds large amounts of ATP (34)
-C02 and water are the byproduct
-Electrons get formed by water and that energy is then used to resynthesize ATP

Limitations

-Carbon monoxide limits the ETC
-

-Slow process which requires oxygen, without oxygen the energy can not be converted.