Question

Slow twitch fibers have a ____ oxidative capacity and ____ glycogen content?

1) High, low
2) Low, high
3) High, high
4) Low, low

Answer 1

Slow-twitch muscle fibers have a high oxidative capacity due to a high number of mitochondria and myoglobin, which supports sustained aerobic activity, and a low glycogen content, relying more on fat for energy.

Step-by-step explanation:

Slow-twitch muscle fibers, also known as Type I fibers, are characterized by their high oxidative capacity. This means they have a high number of mitochondria and are rich in myoglobin, allowing for sustained aerobic activity and greater endurance. Conversely, they have a low glycogen content as they rely more on fat as a fuel source. The correct answer to the question 'Slow twitch fibers have a ____ oxidative capacity and ____ glycogen content?' is: 1) High, low.