muscle physiology
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Are Type 1 muscle fibers Aerobic or Anaerobic? | aerobic - red
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| Are Type 1 muscle fibers slow or fast twitch? | slow
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| Are Type 1 muscle fibers slow-oxidative or fast-glycolytic? | slow-oxidative
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| Are Type 1 muscle fibers tonic or phasic? | Tonic => tonic muscles are responsible for holding your posture
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| Are Type 2 muscle fibers Aerobic or Anaerobic? | Anaerobic - white
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| Are Type 2 muscle fibers slow or fast twitch? | fast twitch
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| Are Type 2 muscle fibers slow-oxidative or fast-glycolytic? | fast-glycolytic
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| Are Type 2 muscle fibers tonic or phasic? | phasic => phasic muscles are used for dynamic movement.
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| what are functional characteristics of Type 1 Muscle fibers? | low fatigability, smaller fibers, large blood supply, large amt of mitochondia
=> Ex: marathon, swimming
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| what are functional characteristics of Type 2 Muscle fibers? | high fatigability, large fibers, less blood supply, less mitochondria
=> Ex:high jump, sprinting
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| What are muscle spindles? | Measures change in LENGTH...spread throughout muscle belly.
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| What is the Golgi Tendon Organ? | Measures changes in TENSION. When a GTO is stimulated, it causes its associated muscle to relax by interrupting its contraction. When a muscle is inhibited by a GTO, the process is called autogenic inhibition.
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| What is an isometric contraction | Metric = length. Tension develops but no change in length of muscle. STATIC
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| what is an isotonic contraction | Tonic = tension. Muscle shortens/lengthens while resisting constant load. DYNAMIC
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| what is an isokinetic contraction | tension develops while shortening or lengthening at a constant speed
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