Which muscle type is striated and can be controlled voluntarily?

Skeletal muscle is the type of muscle that is striated and under voluntary control. This means that an individual can consciously contract these muscles to perform movements, such as lifting objects or walking. The striated appearance of skeletal muscle is due to the organized arrangement of proteins within the muscle fibers, creating a pattern of light and dark bands. This structural feature is characteristic of skeletal muscle, distinguishing it from other types of muscle.

In contrast, cardiac muscle, which is also striated, is not under voluntary control, as it operates automatically to pump blood throughout the body. Smooth muscle, found in the walls of hollow organs, is non-striated and also involuntary, meaning it functions without conscious control. Lastly, the term "involuntary muscle" typically refers to smooth and cardiac muscle types, which do not respond to voluntary commands. Therefore, the identification of skeletal muscle as the correct answer emphasizes its unique characteristics of being striated and voluntarily controlled.