Question

Describe the structure of sarcomere.

Answer 1

By contraction in unison, Sarcomeres may trigger broad sweeping motions. Their specific arrangement helps these small units to coordinate the contractions of our muscles. The contractile characteristics of muscle are in general, a distinguishing function of animals. The motion of animals is particularly smooth and complex.

Complete answer:
• The operating unit of a striated muscle is a sarcomere.
• This implies that our skeletal muscle consists of the most fundamental unit. The muscle form that starts all of our voluntary activity is skeletal muscle.
• Muscle fibres of varying lengths are arranged in a layered pattern as viewed under a microscope.
• The strands of myofibril, thus actin and myosin, form coils of filament connected in parallel.
• When a muscle contracts in our body, it is known that the way this occurs fits the principle of sliding filament.
• When filaments are enabled to slide against one another, this principle assumes that a muscle contracts. This correspondence then will produce contractile force.
• The explanation that the structure of the sarcomere is so important in this hypothesis though is that a muscle has to be shortened mechanically.
• There is therefore a need for a device capable of compensating for a strained muscle's lengthening and shortening.

Note: Scientists that used high-resolution microscopy or filament stains to study myosin as well as actin filaments in operation at different stages of contraction first posited the sliding filament hypothesis.
They were able to imagine in its relaxed state the actual lengthening of the sarcomere, as well as the reduction in its contracted state. Their results culminated in the identification of sarcomere areas.