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What sources of energy Adenosine triphosphate (ATP): the energy carrying
are utilized during resting molecule in the body
and different forms of
physical activity (high/low
intensity exercise)?
ATP must be generated continuously since muscles
How is ATP generated?
store only enough ATP for 1-3 seconds of activity
What is ATP generated ATP is generated from the breakdown of
from? carbohydrate, fat, and protein
, -Creatine Phosphate (CP) stores some energy that
can be used to regenerate ATP
-Creatine Phosphate stores enough energy for 3-15
After depleting ATP
seconds of maximal physical effort
stores, muscles turn to
-Muscle has 4x as much Creatine phosphate than ATP
other sources
-There are broken bonds
-DOES NOT REQUIRE OXYGEN, making it
ANAEROBIC
GLUCOSE.
-Glucose provides ATP through glycolysis
-Next fastest mode of production
-Glucose source during exercise: muscle glycogen
and blood glucose
After Creatine Phosphate,
-Glycogen stores are limited
what is the next source of
-Used in exercise lasting 30 seconds to 3 minutes
energy for ATP
-Primary glycolysis end product: Pyruvate
production?
-With limited oxygen, pyruvate is converted to lactic
acid, a by-product of intense activity
-Excess lactic acid goes back to the liver to be
converted back into glucose
-Via the Cori Cycle process
-Anaerobic breakdown of glucose yields 2 ATP
molecules
-Aerobic breakdown of glucose yields 36-38
Glucose Metabolism molecules of ATP
-Process much slower but yield is far greater
-Fueling the body for 3 min - 4 hours
-Far fewer acids produced vs. Anaerobic pathway