Question

which of the following statements regarding the distribution of various types of skeletal muscle fibers is correct? most muscles contain a mixture of fiber types, although all of the fibers within one motor unit are of the same type there are no red fibers in the muscles of the eye or hand, where swift, brief contractions are required. training for endurance events increase the proportion of fast fibers in the active muscles. most muscles contain a mixture of fiber types, although all of the fibers within one motor unit are of the same type; there are no red (slow) fibers in the muscles of the eye or hand, where swift, brief contractions are required. i dont know yet

Explanation:

Muscles typically have a mix of fiber - types. Motor units are composed of fibers of the same type. Muscles of the eye and hand do have red (slow - twitch) fibers despite needing rapid contractions. Endurance training increases the proportion of slow fibers.

Answer:

Most muscles contain a mixture of fiber types, although all of the fibers within one motor unit are of the same type