A chemical reaction is a process that is usually characterized by a chemical change in which the starting materials (reactants) are different from the products. Chemical reactions tend to involve the motion of electrons, leading to the formation and breaking of chemical bonds. chemical reaction is a process that is usually characterized by a chemical change in which the starting materials (reactants) are different from the products. Chemical reactions tend to involve the motion of electrons, leading to the formation and breaking of chemical bonds.
Skeletal muscle cells are multinucleated because they consist of several cells that have fused together. Muscle cells contain many mitochondria and the characteristic protein filaments(myosin and actin) which are responsible for the muscle contraction. Terminology: the prefix sarco-and myo-both relate to muscle.
Types of connective tissue fibers (released by subunits secreted by fibroblasts). 1  Collagen fibers, the most common fibers in connective tissue proper, are long, straight, and unbranched. 2  Elastic fibers contain the protein elastin and are branched and wavy, returning to their original length after being stretched. Dense connective tissue, or fibrous tissue, consists mainly of collagen fibers and found: 2  between the skeletal muscles and the tendons. 3  between bones and ligaments. 4  covering skeletal muscles and visceral organs.