What are the three types muscle cells?
There are three types of muscle tissue: smooth, skeletal, and cardiac. The walls of the heart contain cardiac muscle cells. They appear striated and are subject to involuntary control.
Which is most likely to extend the entire length of a muscle Fibre?
Myofibrils span the length of a muscle fiber and are approximately 1.2um in diameter. This means that hundreds to thousands of them can be found within one muscle fiber.
What is the hierarchy of muscle tissue?
Muscular Systems Levels of Organization Molecular level — actin, myosin. Microscopic level — myofibrils and sarcomere. Cell level — myoblasts, myofibers. Tissue level — neuromuscular junctions, fascicles. Organ level — Major skeletal muscles.
What muscle fibers are referred to as white?
Fast twitch fibers can be called “white fibers” as they do not contain blood. This gives them a lighter appearance that slow-twitch fibers.
Is a sarcomere a Myofibril?
Myofibrils, which are long filaments that run parallel between each other to create muscle (myo), fibers, are Myofibrils. Muscle fibers are single multinucleated cells which combine to make the muscle. Myofibrils consist of repeating subunits, called sarcomeres. These subunits are responsible for muscle contractions.
Are Myofibrils or Sarcomeres present in smooth muscle fibers?
A smooth muscle is made up of long, spindle-shaped cells with one nucleus. Smooth muscle cells contain thick and thin filaments. However, they do not have well-organized sarcomeres or myofibrils like skeletal muscle. Smooth muscle is therefore not striated.
Which muscle type can be controlled?
Skeletal muscles can be controlled by you.
What types of muscles that Cannot be controlled?
D. There is a variety of muscles within the body. These include smooth muscles, cardiac muscles and skeletal muscles. Only the skeletal muscles can be controlled by us. Smooth muscles and cardiac muscles are not under our control and work independently of our conscious effort.