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Questions and Answers
What is the main source of ATP during exercise in Fast-Twitch Glycolytic muscle fibers?
What is the main source of ATP during exercise in Fast-Twitch Glycolytic muscle fibers?
- Aerobic metabolism
- Glycogenolysis
- Anaerobic glycolysis (correct)
- Oxidative phosphorylation
Which type of muscle fiber has a high glycolytic capacity due to the presence of large amounts of glycolysis enzymes?
Which type of muscle fiber has a high glycolytic capacity due to the presence of large amounts of glycolysis enzymes?
- Type IIB Fast-Twitch Glycolytic fibers (correct)
- Type I Slow-Twitch Oxidative fibers
- Type IIC Intermediate muscle fibers
- Type IIA Fast-Twitch Oxidative-Glycolytic fibers
What inhibits hexokinase as a result of glycogenolysis during muscle contraction?
What inhibits hexokinase as a result of glycogenolysis during muscle contraction?
- Glucose
- Fructose 6-phosphate
- Glucose 6-phosphate (correct)
- Pyruvate
Which metabolic pathway provides most of the ATP requirement for muscle fibers at the onset of exercise?
Which metabolic pathway provides most of the ATP requirement for muscle fibers at the onset of exercise?
What characterizes Fast-Twitch muscle fibers in terms of contraction speed and glycolytic capacity?
What characterizes Fast-Twitch muscle fibers in terms of contraction speed and glycolytic capacity?
Which type of muscle has long, cylindrical fibers that are multinucleated due to cell fusion during embryogenesis?
Which type of muscle has long, cylindrical fibers that are multinucleated due to cell fusion during embryogenesis?
What is the primary energy source utilized by the heart for energy production?
What is the primary energy source utilized by the heart for energy production?
Which protein is absent in Duchenne's muscular dystrophy, leading to muscle atrophy and respiratory muscle failure?
Which protein is absent in Duchenne's muscular dystrophy, leading to muscle atrophy and respiratory muscle failure?
What structural feature differentiates slow-twitch muscle fibers from fast-twitch muscle fibers?
What structural feature differentiates slow-twitch muscle fibers from fast-twitch muscle fibers?
In which type of muscle does muscle contraction occur via an actin/myosin sliding filament system regulated by intracellular calcium levels?
In which type of muscle does muscle contraction occur via an actin/myosin sliding filament system regulated by intracellular calcium levels?
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