Which muscle tissue type attaches to bone?
A Cardiac
B Smooth
C Skeletal
D Skeletal and smooth
The correct answer and explanation is:
The correct answer is C Skeletal.
Explanation:
Skeletal muscle tissue is the type of muscle tissue that attaches to bones and allows for voluntary movement. These muscles are responsible for moving the skeleton and are typically controlled consciously, meaning you can decide when to move them. Skeletal muscles are connected to bones by tendons, which are strong bands of connective tissue.
The structure of skeletal muscle fibers is unique compared to other muscle types. They are long, cylindrical, and multinucleated, meaning they have multiple nuclei per cell. These muscle fibers also have a striated appearance under the microscope, which is a result of the regular arrangement of actin and myosin filaments inside the muscle fibers.
When a skeletal muscle contracts, it pulls on the tendon attached to the bone, which in turn causes movement at the joint. This is how movements such as walking, running, and lifting are produced. Skeletal muscles are generally classified based on their function and location, such as flexors and extensors, or by their shape and size, such as biceps or quadriceps.
In contrast, cardiac muscle is found only in the heart and functions involuntarily to pump blood. It is also striated like skeletal muscle but is not attached to bones. Smooth muscle, on the other hand, is found in the walls of hollow organs like the stomach, intestines, and blood vessels. It functions involuntarily and is not striated. Therefore, only skeletal muscle attaches to bones and plays a direct role in skeletal movement.