Question

Which activity is most likely to use fast twitch fibers? A rabbit scurries into its burrow as a predator approaches. A horse pulls a wagon loaded with wheat from the fields. A dog walks alongside its owner on the beach. A human swims laps in a pool for close to an hour.

Answer 1

Answer: A rabbit scurries into its burrow as a predator approaches.

Explanation:

Fast twich muscles are thicker, quicker to contract and wear out more rapidly than a slow twich does.

The fast twich muscles are the most powerful muscles, lowest in endurance   and it takes place when the body is under maximum exertion.

The example are fast running for a shorter period of time. Running of a rabbit in the burrow as the predator approaches them is example of fast twich.

Answer 2

The correct answer would be:

a. A rabbit scurries into its burrow as a predator approaches.

Fast twitch fibers are fibers that use anaerobic metabolism to create fuel, they are better at generating short bursts of strength or speed than slow muscles. However, they fatigue more quickly.