Join thousands of students who trust us to help them ace their exams!Watch the first video
Multiple Choice
A sprinter picks up the pace using which type of muscle fibers?
A
Type III fibers
B
Type IIb fibers
C
Type I fibers
D
Type IIa fibers
Verified step by step guidance
1
Understand the different types of muscle fibers: Type I, Type IIa, and Type IIb, and their characteristics.
Type I fibers are slow-twitch fibers, known for endurance and continuous, extended muscle contractions over a long time.
Type IIa fibers are fast-twitch fibers, which are a hybrid of Type I and Type IIb, providing a balance between power and endurance.
Type IIb fibers are fast-twitch fibers, specialized for short bursts of power and speed, making them ideal for activities like sprinting.
Identify that sprinters require quick, powerful muscle contractions, which are best supported by Type IIb fibers, due to their ability to generate rapid force.