Question

question 3 of 20 what is the difference between fast - twitch and slow - twitch muscle fibers? a. fast - twitch fibers are what keep us going on a long bike ride or hike. slow - twitch fibers are what we use while dashing for the bus or jumping up for a rebound. b. fast - twitch fibers can deliver a quick burst of power. slow - twitch fibers can maintain a contraction for a longer time. c. they are almost identical. d. fast - twitch fibers take a long time to warm up, but are stronger than slow - twitch fibers once they get going.

Explanation:

Fast - twitch fibers are designed for quick, powerful contractions like sprinting or jumping. Slow - twitch fibers are for endurance activities and can sustain contractions for longer periods, like long - distance running.

Answer:

B. Fast-twitch fibers can deliver a quick burst of power. Slow-twitch fibers can maintain a contraction for a longer time.