In animal skeletal muscles,red muscle fibers
A) have an abundance of myoglobin.
B) are mainly anaerobic.
C) have few mitochondria.
D) are good for short bursts of activity.
E) more than one of these answers is true.

Question

Quizplus · Accepted Answer

Red muscle fibers, also known as slow-twitch fibers, have an abundance of myoglobin which enables them to store more oxygen and have greater endurance compared to white or fast-twitch fibers. Myoglobin gives the fibers their red color and allows them to utilize oxygen more efficiently during aerobic activities such as endurance exercise.

Additionally, options B, C, and D are not accurate descriptions of red muscle fibers. Slow-twitch fibers are primarily aerobic, meaning they rely on oxygen to produce energy, and thus have many mitochondria. They are also better suited for endurance activities instead of short bursts of activity.

In Animal Skeletal Muscles,red Muscle Fibers