Final answer:
The type of muscle cell under voluntary control is the skeletal muscle, which is distinct from cardiac and smooth muscles that are controlled involuntarily.
Step-by-step explanation:
The type of muscle cell under voluntary control is the skeletal muscle. This distinguishes it from cardiac muscle, which is responsible for pumping blood throughout the body, and smooth muscle, which is found in the walls of organs and structures such as the stomach, intestines, and blood vessels. Skeletal muscles are connected to bones and cause movements by contracting and relaxing in response to voluntary signals from the nervous system.
The distinction is important because it relates to how different muscle types are controlled within the body. Voluntary muscles like the skeletal muscles can be moved consciously, allowing you to perform actions like walking and lifting. In contrast, involuntary muscles, which include cardiac and smooth muscles, operate without conscious control, maintaining essential functions like heartbeat and digestion.
When referring to voluntary muscles, which are controlled by an individual's will, it is implied that these are skeletal muscles, also known as striated muscles due to their appearance under a microscope. Cardiac and smooth muscles differ in that they are not under voluntary control, which means they are classified as involuntary muscles.