Fuel Sources For Muscle And Exercise Metabolism Flashcards
What do T-tubules do?
Transports action potential to sarcoplasmic reticulum
What is sarcomere?
Contractile unit of the muscle fiber
What does myoglobin do?
Transports oxygen
What does Interleukin - 6 do?
Cytokine that stimulates glycogen breakdown.
What is actin?
Thin myofilaments
What is lipolysis?
Metabolism of fat stores
What is ATPase?
An enzyme that breaks down ATP for energy
What is Myosin?
Thick myofilaments
What is the TCA cycle?
Aerobic metabolism that occurs in the mitochondrion.
What does Tropomyosin do?
Tropomyosin is a protein filament that blocks binding sites on actin.
______ muscle fibers have fast contractile speed capability within oxidative capacity that makes them moderately resistant to fatigue.
Type IIa
Muscle fibers are recruited by size and speed in the following order:
_____, then ______, and finally ______ when needed.
Type I
Type IIa
Type IIx
List the three primary sources of energy metabolism (modes of ATP resynthesis) in the order they occur based on activity duration.
PCr hydrolysis
Glycolysis
Oxidative phosphorylation (aerobic metabolism)
True or false:
PCr provides energy that is sufficient to feel short duration, high intensity exercise such as interval sprints.
True
True or false:
Hydrogen ions released during glycolysis lower the pH level in muscle, increasing enzyme activity.
False