Question

Which describes the oxidative capacity and glycolytic capacity of type 1 muscle fibers?

A.) high oxidative capacity and low glycolytic capacity
B.) low oxidative capacity and low glycolytic capacity
C.) low oxidative capacity and high glycolytic capacity
D.) high oxidative capacity and high glycolytic capacity

Answer 1

Answer:

high oxidative capacity and low glycolytic capacity

Explanation:

Type I fibers have low ATPase activity (at pH 9.4), are slow twitch, have high oxidative and low glycolytic capacity, and are relatively resistant to fatigue. Type IIA fibers have high myosin ATPase activity (pH 9.4), are fast twitch, have high oxidative and glycolytic capacity, and are relatively resistant to fatigue.