The two main filaments composing the sarcomere are action and myocin.
ya muscles contracted due to actin and myocin protein comtracted
Actin and myosin
molecules called actin and myocin lie next to each other inside muscle cells. when triggered (usually by calcium ions) they shift electron bonds, thus shortening the length of the cell [max about 1/3 shorter] Work is done (using ATP) to restore the cell to its nornal length.
Skeletal muscles of the human have very high tensile strength. With act-in and myocin fibres sliding on each other, it gives very high power to the cells. Well trained athlete has got probably 1/8 to 1/4 strength, weight for weight, that of steel in there muscles.
When your heart rate is higher, oxygen is transferred faster to all parts of the body. Oxygen in the muscles stimulates oxidative phosphorylation, producing more energy in mitochondria from carbon molecules in glucose, etc. The energy (ATP) is used by myocin and act in binding sites to stimulate quicker and longer lasting muscle activity.
the molecule that binds is costraynim it is a very rare molecule and is very hard to find you can find it in volcanoes and in the sea the one that is found in the sea is much different than the one in the volcanoes but they both bind to calcium during muscle contraction the one in the sea has a circulating point which can be changed if it is riied with different nature such as land the one in the volcano is very hard to take out but it is possible it has to be cooled with nitrogen straight away for more than twenty four hours before any human being can touch it with their bare hands
Muscle cells move through the contraction and relaxation of protein filaments called actin and myosin. When a muscle cell receives a signal from a motor neuron, it releases calcium ions that allow actin and myosin to interact and generate force, leading to muscle contraction. This contraction results in the shortening of muscle fibers, causing movement.
Skeletal muscles are striated, voluntary muscles that are responsible for movement by contracting and relaxing. Cardiac muscles are also striated but are involuntary and found in the heart, responsible for pumping blood throughout the body. Smooth muscles are non-striated and involuntary, found in the walls of internal organs to control movements like digestion and blood flow.