Which of the following is true about red muscles?
A) Red muscles are slower than white muscles.
B) Red muscles have fewer mitochondria than white muscles.
C) Red muscles have fibers of greater diameter than those of white muscles.
D) Red muscles contain less myoglobin than white muscles.
E) Red muscles fatigue quickly.

Question

Quizplus · Accepted Answer

Red muscles are also known as slow-twitch fibers and are specialized for endurance activities such as marathon running or long-distance swimming. They contain more mitochondria and myoglobin than white muscles, which allows them to generate energy aerobically and maintain contraction for a longer time. However, this also means that they contract more slowly than white muscles, which are designed for quick, powerful movements like those needed for weightlifting or sprinting.

Which of the Following Is True About Red Muscles