Which statement accurately describes skeletal muscle?

• A. Striated and voluntary; attaches to bones; contracts to facilitate movement.
• B. Unstriated and involuntary; found in walls of hollow organs.
• C. Striated, tubular, branched, uninucleate; located in the walls of the heart.
• D. Non-striated; voluntary; controls smooth muscle action.

Answer: (A)

The main concept here is understanding the defining features and role of skeletal muscle. Skeletal muscle is the type that you can consciously control to move your body. It has a striped (striated) appearance under the microscope due to its organized sarcomeres, and it attaches to bones (usually via tendons). When it contracts, it shortens and pulls on bones across joints, producing movement.

This combination—striated structure, voluntary control, and attachment to bones for movement—fits skeletal muscle best. The other descriptions match other muscle types: smooth muscle is non-striated and involuntary, found in walls of hollow organs; cardiac muscle is striated but involuntary and located in the heart with branched fibers; and a non-striated, voluntary description does not describe skeletal muscle.