Which type of muscle fibers are referred to as type 1 muscle fibers, or red muscle?
A) Fast twitch
B) Slow twitch
C) Moderate twitch
D) Intermediate twitch

Question

Quizplus · Accepted Answer

Muscle fibers that contain large amounts of myoglobin and mitochondria, and have copious amounts of blood capillaries, are called type 1. Because type 1 contains larger amount of myoglobin and blood vessels, they take on a deeper red appearance and are called red muscle fibers. Slow twitch fibers contract more slowly, for longer periods of time, and they take longer to fatigue. Type 1 or red fibers are also classified as slow twitch fibers.

Which Type of Muscle Fibers Are Referred to as Type