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12 Cards in this Set
- Front
- Back
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During low intensity exercise, what energy sources are used and by what types of muscle fibers?
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fat is used by slow oxidative fibers (Type I)
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During high intensity exercise, what energy sources are used and by what types of muscle fibers?
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glycogen is used by fast-glycolytic fibers.
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What enzymes do fast glycolytic fibers have more of?
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Those involved in Glycolysis
Myosin ATPase Ca2+/ATPase |
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What structures do oxidative fibers have more of?
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Mitochondria
Myoglobin Capillaries |
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Which type of muscle fiber has more Myosin ATPase?
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glycolytic
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Define Muscle Fatigue
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When an exercising muscle can no longer respond to stimulation with the same degree of contractile activity.
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What purpose does increasing respiration after exercise serve?
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Repays Oxygen debt:
3.) convert lactic acid back to pyruvic acid 4.) Convert lactic acid to glucose in the liver to replenish Glycogen |
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What is the first thing that happens after exercise?
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Replenish ATP stores via oxidative phosphorylation to resynthesize Phosphogens.
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How is lactic acid removed after exercise?
How long does this take? |
It is brought to the liver where is is converted to Pyruvic Acid. Then that is converted to glucose to replenish glycogen stores.
Several Hours. |
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Energy use during exercise in Oxidative vs. Glycolytic Fibers.
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Oxidative Fibers use phosphogens then O2 phosphorylation
Glycolytic Fibers use Glycogen and produce Lactic Acid. |
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What provides feedback about muscle length?
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Muscle Spindles
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What provides feedback about muscle tension?
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Golgi Tendons
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