Each physical or health hazard is a âhazard classâ (e.g., Carcinogenicity is a hazard class). A âhazard classâ may be sub-divided in the criteria into. several âhazard categoriesâ based on the degree of. severity of the hazard.
Quick Answer. Calcium is a crucial part of muscle contraction. The ionic element is released from muscles during contraction and relaxation. The release of calcium helps propagate the muscle contraction and relaxation stages. Continue Reading.
smooth muscle contraction. -calmodulin is the protein used to bind calcium ions to skeletal muscle when its fibers are stimulated. -hormones can stimulate or inhibit contraction. -stretching of the muscle can cause contraction. -slower to contract and relax, but can forcefully contract longer with the same amount of ATP.