[04] Muscle Metabolism Flashcards
What are the primary sources of energy for muscle activity?
- ATP
- Creatine phosphate
- Glycogen
What is the first source of energy used for muscle contraction?
ATP
What is the role of “Creatine Phosphate” in muscle metabolism?
It provides a quick source of energy by donating a phosphate group to ADP to form ATP.
How does “Glycogen” contribute to muscle energy supply?
It’s broken down into glucose, which is used to generate ATP through glycolysis and aerobic respiration.
What is “ATP”?
Adenosine triphosphate, the main energy currency of cells.
What happens to ATP during muscle contraction?
It’s broken down into ADP and a phosphate group, releasing energy for muscle activity.
What is “ADP”?
Adenosine diphosphate, the product of ATP dephosphorylation.
What is the role of “Glycolysis” in muscle metabolism?
It breaks down glucose into pyruvate, producing a small amount of ATP.
What is “Aerobic Respiration”?
A process that produces ATP in the mitochondria from glucose, fatty acids, and amino acids in the presence of oxygen.
How does “Anaerobic Respiration” or “Lactic Acid Fermentation” relate to muscle metabolism?
It produces ATP from glucose in the absence of oxygen, resulting in the production of lactic acid.
What is “Lactic Acid”?
A byproduct of anaerobic glycolysis that can cause muscle fatigue.
What is “Muscle Fatigue”?
A condition where muscles are unable to contract despite continued stimulation, often due to a build-up of lactic acid.
How does the body deal with lactic acid produced during high-intensity exercise?
It’s transported to the liver where it’s converted back into glucose.
What are the three stages of energy use during exercise?
- Immediate energy system (ATP and creatine phosphate)
- Glycolytic system (anaerobic respiration)
- Oxidative system (aerobic respiration)
What is “Oxygen Debt” or “Excess Post-Exercise Oxygen Consumption” (EPOC)?
The additional oxygen required after exercise to restore pre-exercise conditions.
