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Muscle Fiber Types
Characteristics of Muscle Fiber Types (Slow, Intermed, Fastest)
Question | Answer |
---|---|
Speed of Development of Maximum Tension: SLOWEST | Type I |
Speed of Development of Maximum Tension:INTERMEDIATE | Type IIa |
Speed of Development of Maximum Tension:FASTEST | Type IIb |
Myosin ATPase activity: Slow | Type I |
Myosin ATPase activity: Fast | Type IIa |
Myosin ATPase activity: Fastest | Type IIb |
Diameter: Small | Type I |
Diameter: Medium | Type IIa |
Diameter: Large | Type IIb |
Contraction Duration: Longest | Type I |
Contraction Duration: Short | Type IIa |
Contraction Duration: Shortest | Type IIb |
Ca++/ATPase activity in SR: Moderate | Type I |
Ca++/ATPase activity in SR: High | Type IIa |
Ca++/ATPase activity in SR: Highest | Type IIb |
Endurance: Fatigue Resistant | Type I |
Endurance: Fatigue Resistant (Less) | Type IIa |
Endurance: Easily Fatigud | Type IIb |
Use: Posture, most used | Type I |
Use: Standing, Walking | Type IIa |
Use: Jumping, least used | Type IIb |
Metabolism: Oxidative; aerobic | Type I |
Metabolism: Glycolytic but more oxidative with endurance training | Type IIa |
Metabolism: Glycolytic, more anerobic than type IIa | Type IIb |
Capillary Density: High | Type I |
Capillary Density: Medium | Type IIa |
Capillary Density: Low | Type IIb |
Mitochondria: Numerous | Type I |
Mitochondria: Moderate | Type IIa |
Mitochondria: Few | Type IIb |
Color: Dark Red | Type I |
Color: Red | Type IIa |
Color: Pale | Type IIb |
Slow-Twitch oxidative, red muscle | Type I |
Fast-Twitch oxidative-glycolytic, red muscle | Type IIa |
Fast-Twitch glycolytic; white muscle | Type IIb |