Metabolic Responses to Intense Exercise W2 Flashcards
What happens if we completely run out of ATP during exercise?
We go into Rigour Mortis
What is the primary source of energy during the first few seconds of an exercise bout?
PCr
Why is ATP well preserved?
Its required for relaxation as well as contraction
When lactate builds up, what is this an indication of?
Glycogen breakdown
Production of pyruvate
When can pyruvate enter the mitochondrial?
Around 15 seconds as prior exercise rate is too intense
What is the major energy provision in the first 15 seconds?
Glycolysis
PCr (Phosphagens (ATP))
Substrate Oxidative system (Myokinase Regulation)
What does a final drop in pyruvate indicate?
Some pyruvate is oxidised into Acetyl CoA in the mitochondria
What is formed when pyruvate is formed into Acetyl CoA in the mitochondria?
NAD
During the first 30 seconds of HIE, why is there gradually more energy production via oxidative phosphorylation?
Maximal intensity level is unable to be sustained
What can cause fatigue in High Intensity Exercise?
Accumulation of extracellular K+
Localised ATP depletion
Reduced Ca2+ release and uptake
What is stored in the liver?
Glycogen
What is stored in adipose tissue?
Triacylglycerol
What is glycogen broken down into to enter skeletal muscle?
Glucose
What is triacylglycerol broken down into to enter skeletal muscle?
Fatty Acids
What is used as energy in skeletal muscle?
ATP
PCr
Glycogen
Amino Acids
Triacylglycerol
