Produced from | Hormone | Function | ||
(a) | β -cells (pancreas) | Insulin | Acts to lower blood glucose levels | |
(b) | Cells of the Leydig (testes) | Testosterone | Promotes the development of male sexual characteristics including sperm development | |
(c) | Parathyroid | Parathyroid hormone (PTH) | Increases blood calcium levels in the blood when they are low | |
(d) | Adrenal medulla | Adrenaline and noradrenaline (the catecholamines) |