Compared to Oxidative Skeletal Muscle Fibers, Those Classified as Glycolytic

Question

Compared to oxidative skeletal muscle fibers, those classified as glycolytic typically have
A) a higher concentration of myoglobin.
B) a higher density of mitochondria.
C) a darker visual appearance.
D) a smaller diameter.
E) less resistance to fatigue.

Accepted Answer

Glycolytic muscle fibers rely heavily on anaerobic metabolism, which produces lactic acid and leads to fatigue more quickly than oxidative fibers. This means they have less resistance to fatigue. The other choices are characteristic of oxidative fibers, not glycolytic ones.