The m line
Actin
The I band in the sarcomere is where actin filaments are anchored. It helps maintain the structure of the sarcomere and allows for muscle contraction to occur efficiently.
The filament connected to the Z line in a muscle cell is thin filament, specifically actin filament. Thick filaments (myosin) are connected to the M line in the sarcomere.
The length of the thick filament is the A band. The A band contains both thick and thin filament because they are overlapping each other. The H band is thick filament only, however, it only covers a portion of width of the thick filament.
Z-lines separate one sarcomere from the next within a myofibril. These are structures composed of actin filaments where thin filaments from adjacent sarcomeres are anchored.
In the sliding filament theory of muscle contraction, the thin filament (actin) slides over the thick filament (myosin). Myosin is responsible for pulling the actin filaments towards the center of the sarcomere during muscle contraction.
M-line, causing overlap with the thick filament during muscle contraction. This results in the sarcomere shortening and overall muscle contraction.
It is a section of the Sarcomere that stretches from one end of the Myosin filament to the other, and also includes parts of the Actin filaments that overlaps it.
No, actin filaments do not extend the entire length of a sarcomere. Actin filaments are found in the I band and span from the Z line towards the middle of the sarcomere, where they overlap with myosin filaments. The myosin filaments extend the length of the sarcomere in the A band.
The filament is made of tungten and these 'wires' (filament) conduct electricity.
The myosin myofilament pulls on the actin myofilament during muscle contraction. This interaction, known as the sliding filament theory, results in the shortening of the sarcomere and muscle contraction.
During muscle contraction, the thin filaments (actin) are pulled towards the center of the sarcomere, which causes the Z-lines to move closer together. This process is facilitated by the interaction between actin and myosin filaments during the sliding filament mechanism of muscle contraction.