muscle fibre types Flashcards
What are the three main types of muscle fibers?
Type I, Type IIa, and Type IIb.
True or False: Type I muscle fibers are also known as slow-twitch fibers.
True.
Fill in the blank: Type IIa fibers are classified as __________ fibers.
fast-twitch oxidative.
What is the primary energy source for Type I muscle fibers?
Aerobic metabolism.
Which muscle fiber type is most resistant to fatigue?
Type I.
True or False: Type IIb fibers have a higher oxidative capacity than Type IIa fibers.
False.
What color are Type I muscle fibers typically described as?
Red.
Which muscle fiber type is best suited for short bursts of power?
Type IIb.
What is a key characteristic of Type IIa muscle fibers?
They have both aerobic and anaerobic capabilities.
Multiple Choice: Which type of muscle fiber has the largest diameter? A) Type I B) Type IIa C) Type IIb
C) Type IIb.
True or False: Type IIa fibers can adapt to endurance training.
True.
What is the main function of Type IIb muscle fibers?
Rapid and powerful contractions.
Fill in the blank: Muscle fibers are composed of __________.
myofibrils.
Which muscle fiber type is primarily used in endurance activities?
Type I.
What is the main characteristic of Type IIb fibers?
They fatigue quickly.
