7.1.3 Types of Muscle Fibers

    Cards (106)

    • What are muscle fibers responsible for in skeletal muscle?
      Muscle contraction
    • Slow twitch fibers are also known as Type I
    • Slow twitch fibers have high endurance and slow contraction speeds.
    • Match the muscle fiber type with its primary characteristic:
      Slow Twitch (Type I) ↔️ High myoglobin content
      Fast Twitch Type IIA ↔️ Medium contraction speed
      Fast Twitch Type IIB ↔️ Very fast contraction speed
    • Which energy production method is primarily used by Fast Twitch Type IIB fibers?
      Anaerobic
    • Slow twitch fibers are ideal for maintaining posture
    • Arrange the muscle fiber types by their contraction speed from slowest to fastest:
      1️⃣ Slow Twitch (Type I)
      2️⃣ Fast Twitch Type IIA
      3️⃣ Fast Twitch Type IIB
    • Fast Twitch Type IIA fibers use both aerobic and anaerobic energy production.
    • What is the primary energy source for Slow Twitch fibers?
      Aerobic
    • Fast Twitch Type IIA fibers have medium levels of myoglobin
    • What is the main use of Fast Twitch Type IIB fibers?
      Sprinting
    • Slow Twitch fibers have low myoglobin content compared to Fast Twitch Type IIA fibers.
      False
    • Slow Twitch fibers are highly efficient at storing and transporting oxygen
    • Which type of muscle fiber is primarily used in middle-distance running?
      Fast Twitch Type IIA
    • Arrange the main differences between muscle fiber types in terms of their importance for athletic performance:
      1️⃣ Contraction speed
      2️⃣ Endurance
      3️⃣ Energy production methods
    • Slow Twitch fibers have high endurance due to their aerobic energy production.
    • Slow Twitch (Type I) muscle fibers primarily use aerobic energy production.
    • Slow Twitch (Type I) muscle fibers are ideal for endurance activities like long-distance running
    • Fast Twitch Muscle Fibers are classified into Type IIA and Type IIB
    • Type IIA fibers have moderate endurance
    • Type IIB fibers have low endurance but very fast contraction speed.
    • What are muscle fibers responsible for?
      Muscle contraction
    • Match the muscle fiber type with its primary use:
      Slow Twitch (Type I) ↔️ Maintaining posture
      Fast Twitch Type IIA ↔️ Middle-distance swimming
      Fast Twitch Type IIB ↔️ Short bursts of sprinting
    • Slow Twitch (Type I) fibers are characterized by high endurance and aerobic energy
    • Fast Twitch Type IIA fibers have moderate endurance and use both aerobic and anaerobic energy production
    • Fast Twitch Type IIB fibers have low endurance and rely solely on anaerobic energy production
    • The main differences between muscle fiber types lie in their contraction speed, endurance, and energy production methods.
    • Slow Twitch (Type I) fibers have a slow contraction
    • Slow Twitch (Type I) fibers have a high myoglobin content
    • Order the muscle fiber types from highest to lowest endurance:
      1️⃣ Slow Twitch (Type I)
      2️⃣ Fast Twitch Type IIA
      3️⃣ Fast Twitch Type IIB
    • Match the activity with the primary muscle fiber type used:
      Long-distance running ↔️ Slow Twitch (Type I)
      Weightlifting ↔️ Fast Twitch (Type II)
      Swimming ↔️ Both Slow and Fast Twitch
    • What are muscle fibers responsible for in skeletal muscle?
      Muscle contraction
    • Slow Twitch (Type I) muscle fibers have high endurance and use oxygen for energy production, making them primarily aerobic.aerobic
    • What type of energy production is used by Fast Twitch Type IIA muscle fibers?
      Aerobic & anaerobic
    • Fast Twitch Type IIB muscle fibers have low endurance but fast contraction speed.
    • Match the muscle fiber type with its primary characteristic:
      Slow Twitch (Type I) ↔️ High endurance
      Fast Twitch Type IIA ↔️ Moderate endurance
      Fast Twitch Type IIB ↔️ Low endurance
    • The key differences between muscle fiber types lie in contraction speed, endurance, and energy production
    • What allows Slow Twitch (Type I) muscle fibers to have high endurance?
      Aerobic energy production
    • Order the properties of Slow Twitch (Type I) muscle fibers from highest to lowest:
      1️⃣ Endurance
      2️⃣ Myoglobin content
      3️⃣ Contraction speed
    • Slow Twitch (Type I) muscle fibers are ideal for short bursts of high-intensity activity.
      False
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