what is protein hormones  used for
Important hormonal proteins include the hormones insulin and parathyroid hormone. These two protein hormones have important physiological roles in the body. Insulin has the role of facilitating the entry of glucose molecules into the liver cells.
Study what happens when there is a deficiency in the protein parathyroid hormone. This hormone is important for the proper metabolism of calcium and bone tissue in the body. The physiological role of this protein hormone in the body of humans is well known and is well understood.