Question

question 48 so - called fast muscle fibers are bright red. are pale. are found exclusively in flexors. are found exclusively in extensors.

Explanation:

Fast - muscle fibers have less myoglobin compared to slow - muscle fibers. Myoglobin gives muscles a red color, so fast - muscle fibers are pale due to the lower amount of myoglobin. They are not exclusive to flexors or extensors.

Answer:

B. are pale.