Slow twitch fibers appear red due to the intracellular storage of ________.

Name: Slow twitch fibers appear red due to the intracellular storage of ________.
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Slow twitch fibers are also called type I fibers and they have a high concentration of myoglobin, an oxygen-binding protein in muscle tissue. Myoglobin is responsible for the reddish color of slow twitch fibers. Choices A, B, D are not related to the color of muscle fibers, while hemoglobin is found in red blood cells, not inside muscle fibers.

Slow Twitch Fibers Appear Red Due to the Intracellular Storage