Which three are the commonly recognized muscle fiber types?

• A. Skeletal, Cardiac, Smooth
• B. Cardiac, Smooth, Striated
• C. Skeletal, Smooth, Voluntary
• D. Skeletal, Cardiac, Striated

Answer: (A)

Three distinct muscle tissue types define the major muscle fibers in the body. The recognized trio is skeletal, cardiac, and smooth. Skeletal muscle fibers are long and striated, typically under voluntary control for movement. Cardiac muscle fibers are striated as well but operate involuntarily and form the heart’s pumping network. Smooth muscle fibers are non-striated and involuntary, lining the walls of hollow organs and blood vessels. The other options mix descriptors like striated or voluntary with tissue categories, which don’t represent separate muscle tissue types.