What is an organ that produces a hormone?

Other Hormone-Producing Tissues and Organs

Indicate the endocrine role of the kidneys, the stomach and intestine, the heart, and the placenta.

• Kidneys – produces renin when blood pressure drops and causes the release of aldosterone causing the kidneys to reabsorb sodium and potassium ions – produces erythropoietin that promotes the production of red blood cells in the bone marrow – also activates vitamin D made by epidermal cells of skin that causes intestine cells to actively transport dietary calcium across the intestinal cell membranes
• Stomach – produces gastrin – stimulates glands to release hydrochloric acid (HCL)
• Duodenum (small intestine) – produces intestinal gastrin that inhibits HCL secretion by the stomach and gastrointestinal tract mobility – produces secretin that stimulates the release of bicarbonate-rich juice by the pancreas and increases release of bile from the liver and inhibits secretory activity of the stomach – produces cholecystokinin (CCK) that stimulates the pancreas to release a enzyme-rich juice, stimulates the gallbladder to release stored bile, causes the duodenal papilla sphincter to relax, allowing bile and pancreatic juice to enter the duodenum
• Heart – atrial natriuretic peptide (ANP) – prevents aldosterone release by the adrenal cortex to reduce blood volume and blood pressure – inhibits the kidneys from reabsorbing sodium and from releasing renin
• Placenta – produces human chorionic gonadotropin (hCG) – initially produced by the conceptus and then by the fetal part of the placenta – stimulates the corpus luteum of the ovary to continue producing estrogen and progesterone so that the lining of the uterus is not sloughed off in menses until the third month of pregnancy and then the placenta takes over the role of producing the hormones and the ovaries become inactive for the rest of the pregnancy – also helps prepare the breasts for producing milk – human placental lactogen (hPL) – works with estrogen and progesterone in preparing the breasts for lactation – produces relaxin – causes the mother’s pelvic ligaments and pubic symphysis to relax and become more flexible, which eases birth passage