Despite their lumbering appearance, alligators are capable of quick bursts of speed.This is most likely because their muscles
A) fuel their rapid movement with high levels of mitochondria.
B) have surprisingly low rates of ATPase activity.
C) are slow-twitch muscles.
D) are fast-twitch muscles.
E) have substantial reserves of glycogen.

Question

Quizplus · Accepted Answer

Alligators are capable of quick bursts of speed due to their fast-twitch muscles, which provide short bursts of energy for rapid movement.

Answer A is incorrect because high levels of mitochondria are characteristic of slow-twitch muscles, which are used for endurance activities like swimming.

Answer B is also incorrect because low rates of ATPase activity would indicate slower muscle contractions, which would not allow for rapid movement.

Answer C is incorrect because slow-twitch muscles are not capable of providing the quick bursts of energy needed for rapid movement.

Answer E is incorrect because while glycogen is a source of energy for muscles, it alone would not provide enough energy for the rapid movement seen in alligators.

Despite Their Lumbering Appearance, Alligators Are Capable of Quick Bursts