True or false: Most muscles contain a predominance of one skeletal muscle fiber type. Explain the reasoning behind your choice.

Video transcript

Everyone. Let's take a look at this question together which of the following activities can be sustained by type one muscle fibers. Is it answer choice. A sprinting answer, choice B, weight lifting, answer choice C long distance running or answer choice. D long jumping. Let's work this problem out together to try to figure out which of the following activities are sustained by the type one muscle fibers that are the slow twitch oxidative muscle fibers. So in order to determine which of the following activities can be sustained by those type one muscle fibers, we have to recall what we know about the type one slow twitch oxidative muscle fibers. And we note that those type one muscle fibers have a high density of mitochondria and contain large amounts of myoglobin, which we note that that characteristic of the type one muscle fibers allows for a greater oxygen supply and oxidative metabolism, which as a result of these characteristics allows the individual to be better suited for endurance activities. So looking at our answer choices, we want to determine of the following answer choices, which one is a type of endurance activity. And we know that answer choice C long distance running is that endurance activity? So answer choice. C long distance running is the correct answer since long distance running requires that greater energy production or that greater oxygen supply and oxidative metabolism. So it is the correct answer. I hope you found this video to be helpful. Thank you and goodbye.