Question

Your muscles contain both fast twitch and slow twitch muscle fibers in different ratios? When looking at these fibers under a microscope, one type Of muscle fiber has more mitochondria and blood vessels. Which type of muscles fiber would you expect this to be? Why?

Answer 1

Slow-twitch muscle fibers have more mitochondria and blood vessels and are used in endurance activities.

Step-by-step explanation:

The type of muscle fiber that would have more mitochondria and blood vessels when viewed under a microscope is slow-twitch muscle fiber. Slow-twitch muscle fibers are dense with capillaries and rich in mitochondria. They contain a protein called myoglobin, which helps store oxygen. These fibers are used primarily in endurance activities that require sustained contractions over long periods of time, such as distance running or cycling.