Peptide hormone growth hormone, which acts on bone, muscle, and the liver. The posterior pituitary gland secretes antidiuretic hormone, also called vasopressin, and oxytocin. The parathyroid gland secretes parathyroid hormone, the main hormone responsible for regulating serum calcium and phosphorus levels. Peptide hormones are also produced by many different organs and tissues, including the heart (atrial-natriuretic peptide (ANP) or atrial natriuretic factor (ANF)) and pancreas (glucagon, insulin and somatostatin), the gastrointestinal tract (cholecystokinin, gastrin), and adipose tissue stores (leptin). Peptide hormone Peptide hormones or protein hormones are hormones whose molecules are peptides or proteins, respectively. The latter have longer amino acid chain
Adrenocortical hormone and increased blood potassium levels caused by a deficiency of aldosterone. These electrolyte imbalances induce nerve and muscle issues. Other symptoms include fatigue, salt cravings, weight loss, and increased skin pigmentation. Increased skin pigmentation is caused by a deficiency of the adrenocortical hormone hydrocortisone. Its normal behavior would be as negative feedback at the pituitary gland, stimulating the pituitary gland to decrease secretion of corticotropin. Because hydrocortisone is not able to be produced in Addison’s disease, the pituitary gland continues to secrete corticotropin which binds to the receptor for melanocyte-stimulating hormone. It then causes melanocytes to produce more pigment, thus