Which of the following statements correctly describes properties associated with the development of skeletal muscle cells? Check all that apply A. Skeletal muscle cell are multi nucleated cells B. Skeletal muscle cells have the capacity for repair due to the actions of myosatellite cells C. Skeletal muscle cells develop via the process of mitosis D. Skeletal muscle develop from a single myoblast cellÂÂ
The Correct Answer and Explanation is :
The correct statements are:
A. Skeletal muscle cells are multinucleated cells.
B. Skeletal muscle cells have the capacity for repair due to the actions of myosatellite cells.
D. Skeletal muscle develops from a single myoblast cell.
Explanation:
A. Skeletal muscle cells are multinucleated cells:
Skeletal muscle fibers (cells) are indeed multinucleated. This means that each muscle cell has multiple nuclei. This is due to the fusion of individual myoblasts (precursor muscle cells) during muscle development. These multiple nuclei are essential for coordinating the large volume of protein synthesis and energy production required for muscle contraction. This characteristic is a unique feature of skeletal muscle tissue.
B. Skeletal muscle cells have the capacity for repair due to the actions of myosatellite cells:
Skeletal muscle does have the capacity for repair and regeneration, but this is due to the actions of myosatellite cells, which are a type of stem cell located on the outer surface of muscle fibers. These cells remain dormant until muscle injury occurs, at which point they activate, proliferate, and fuse with damaged muscle fibers or form new fibers. While muscle repair is limited compared to some other tissues, myosatellite cells play a crucial role in maintaining muscle function after injury.
C. Skeletal muscle cells develop via the process of mitosis:
This statement is incorrect. Skeletal muscle fibers develop not through mitosis, but through the fusion of myoblasts. Myoblasts are precursor cells that proliferate through mitosis, but when they fuse together, they form a multinucleated muscle fiber. Therefore, while mitosis occurs in the early stages of muscle development, it is the fusion of these cells that ultimately forms the muscle fiber.
D. Skeletal muscle develops from a single myoblast cell:
While each skeletal muscle fiber originates from a single myoblast, muscle development involves the fusion of multiple myoblasts into a single, long muscle fiber. The individual myoblasts line up and fuse during the process of myogenesis, resulting in the formation of multinucleated muscle fibers.
In summary, skeletal muscle development is a complex process that involves the fusion of myoblasts, the presence of multinucleated cells, and the involvement of myosatellite cells for repair.