| A | B |
|---|
| hormone | organic substance secreted by a cell |
| lipids | fatty substances |
| negative feedback system | control of hormonal secretions |
| pituitary gland | located at the base of the brain |
| proclactin | PRL |
| growth hormone | stimulates body cells to increase size |
| thyroxine | t4 |
| thyroid gland | located below larynx |
| calcitonin | third hormone |
| parathyroid glands | located on the posterior surface of the thyroid gland |
| adrenal glands | closely associated with the kidneys |
| adrenal medulla | consits of irreglarly shaped cells |
| adrenal cortex | makes up the bulk of the adrenal gland |
| pancreas | exocrine gland that secretes digestive juice |
| pineal gland | secrets the hormone melatonin |
