Assess your progress number 15
Describe the functions of proteins in the body.
The body uses essential and nonessential amino acids to synthesize proteins. Proteins perform numerous functions in human body, like collagen provides structural strength in connective tissue, as keratin in the skin, and the combination of actin and myosin makes muscle contraction possible. Enzymes regulate the rate of chemical reactions, and protein hormones regulate many physiological processes. Proteins in the blood prevent changes in pH promote coagulation factors, and transport oxygen and carbon dioxide. Proteins also move materials across plasma membranes, and other proteins in the plasma membrane function as receptor molecules. As an energy source, proteins