Question

What are the relative potentials for force and power generation by a slow-twich muscle fiber and a fast-twitch muscle fiber of the same diameter? Given:

- Power = force x velocity
- Force exerted by a muscle is proportional to the cross-section area of its contractile elements, which depends on both fiber type and environmental factors.

A. the slow-twitch and fast twitch fiber possess the same potentials for force and power generation
B. the slow-twitch fiber is capable of generating more force than the fast-twitch fiber, while the potential for power generation is the same.
C. the fast-twitch fibers is capable of generating more power than the slow-twitch fiber, while the potential for force generation is the same
D. the fast-twitch fibers is capable of generating more force than the slow-twitch fiber, while the potential for power generation is the same

Answer 1

Fast-twitch fibers are capable of generating more force than slow-twitch fibers, while the potential for power generation is the same.

Step-by-step explanation:

The relative potentials for force and power generation differ between slow-twitch and fast-twitch muscle fibers of the same diameter. Slow-twitch fibers are better suited for endurance activities and can contract for long periods of time but with less force. Fast-twitch fibers, on the other hand, can contract rapidly and powerfully but fatigue quickly. Therefore, the fast-twitch fibers are capable of generating more force than the slow-twitch fiber, while the potential for power generation is the same.