In terms of muscle types, which of the following is not controlled voluntary?

Voluntary muscle control refers to muscles that can be consciously controlled by an individual. Skeletal muscles, which are involved in moving the body and enabling movement, fall under this category as they are attached to bones and can be contracted at will.

In contrast, involuntary muscles function without conscious control. This includes both smooth muscle, which is found in parts like the digestive tract and blood vessels, and cardiac muscle, which forms the heart. Cardiac muscle is specifically important for its ability to contract rhythmically and autonomously to pump blood.

While striated muscle refers to the appearance of the muscle fibers under a microscope (including both skeletal and cardiac muscles), "involuntary muscle" distinctively identifies those muscle types that operate without conscious thought. Hence, the correct identification of involuntary muscle as not controlled voluntarily is based on its fundamental physiological characteristics.