Supernova
Supernova
Supernova
Skeletal or voluntary muscle is capable of rapid contraction and is responsible for skeletal movement.
Sumation of contraction
To accomplish a strong contraction that is stimulated at a rapid rate, the muscle fibers need sufficient ATP for energy production, calcium ions for muscle contraction, and acetylcholine for nerve stimulation. Additionally, a well-coordinated activation of motor units is necessary to achieve a strong and rapid contraction.
Hyperreflexia (severe rapid tonic contraction of body).
The sound produced due to the rapid expansion and contraction of heated air is called a "thermal expansion wave" or a "heat-induced acoustic wave." When air is rapidly heated, it expands quickly, creating a pressure wave that propagates as sound. This phenomenon is commonly observed in various natural and man-made processes, such as thunder during a lightning strike or the popping sound of a heated metal object being cooled rapidly.
The correct phase order of the stretch-shortening cycle is eccentric contraction, amortization phase, and concentric contraction. This sequence allows for energy storage during the eccentric phase, a brief pause to transition from lengthening to shortening, and then rapid muscle shortening in the concentric phase for powerful movement.
Making heat, or thermogenesis, is actually a side effect of cellular metabolism. As energy is produced, heat is released as a byproduct of the chemical reactions of energy production. Heat can also be produced on a larger scale by shivering (or rapid contraction and relaxation) of the muscles.
Contraction Band Necrosis
Ventricular fibrillation is a rapid, irregular and uncoordinated contraction of the cardiac muscles.
Thunder is typically low pitch because it is produced by the rapid expansion and contraction of air caused by lightning, which creates low-frequency sound waves that we hear as rumbling noise.