Slow-twitch fibers
A) are also called glycolytic muscle.
B) are also called white muscle.
C) are well supplied with mitochondria.
D) contain less myoglobin than fast-twitch fibers within the same muscle.
E) are found in lower proportion in the leg muscles than breast muscles of farmed chickens.

Question

Quizplus · Accepted Answer

Slow-twitch fibers are also known as type I muscle fibers, and they are well supplied with mitochondria, allowing them to generate energy through oxidative metabolism. This helps them to sustain activity over a long period and delays fatigue. Additionally, slow-twitch fibers contain more myoglobin than fast-twitch fibers within the same muscle, which gives them a reddish color. White muscles, also known as fast-twitch fibers, are the opposite of slow-twitch fibers in terms of their structure and function. Finally, the proportion of slow-twitch fibers can vary based on muscle type and species. For example, in chickens, breast muscles contain a higher proportion of slow-twitch fibers than leg muscles.

Slow-Twitch Fibers