Here, weâre concerned, like Lord Chesterfield, with âthe average cat.â On average, female cats live one to two years longer than male cats. On average, indoor cats live longer than outdoor cats. On average, wild, homeless, and feral cats live dramatically shorter lives than domestic cats.
During contraction, myosin heads bind to actin molecules of the. thin filaments. Flexing of the myosin heads pulls the thin filaments over the thick. filaments - shortening the sarcomere. Muscle contraction requires.
A cramp is the tightening of a muscle into the contracted state. Muscles have two states: relaxed and contracted. A muscle is relaxed when all of the fibers within the muscle are elongated. When the muscle does its job, calcium goes into the muscle cells and sodium rushes out. Doing so causes the fibers to shorten and the muscle to pull--doing itâs work.