Type IIBX skeletal muscle fibers

Question

Quizplus · Accepted Answer

Type IIBX muscle fibers are also known as type IIB or fast-twitch glycolytic fibers. They are characterized by their ability to generate high levels of force rapidly but fatigue quickly. Therefore, option A and C are incorrect. Type IIA fibers generate more tension than type I fibers, but type IIBX fibers generate even more tension. However, this option is not mentioned in the question stem. Option D is incorrect because type IIBX fibers have a lower myoglobin concentration compared to type I and type IIA fibers.

Type IIBX Skeletal Muscle Fibers