| A | B |
|---|
| Exocrine | Glands that secrete their products through ducts opening onto an epithelium rather than directly into the bloodstream. |
| Endocrine | Relating to glands that secrete hormones directly into the blood. |
| Hyperthyroidism | Overactivity of the thyroid gland, resulting in a rapid heartbeat and an increased rate of metabolism. |
| Hypothyroidism | Abnormally low activity of the thyroid gland resulting in a slow metabolism. |
| Calcitonin | A hormone secreted by the thyroid that has the effect of lowering blood calcium. |
| Parathyroid hormone | Glands on to the thyroid that secretes a hormone that regulates calcium levels in a person's body. |
| Islets of Langerhans | Groups of pancreatic cells secreting insulin and glucagon. |
| Glucagon | A hormone formed in the pancreas that promotes the breakdown of glycogen to glucose in the liver. |
