| A | B |
|---|
| Endocrine System | Consist of endocrine glands that secrete hormones, which regulate a wide range of activities in humans |
| Hormones | Are secreted by glands and diffuse directly into the bloodstream |
| Pituitary Gland | Called the “master gland” because it controls the activities of other glands |
| Growth Hormone (GH) | This hormone controls the growth of the body by stimulating the elongation of bones |
| Thyroid Stimulating Hormone (TSH) | Stimulates the thyroid gland to produce its hormone thyroxin |
| Thyroid Gland | Located in the neck below the larynx and in front of the trachea |
| Thyroid Gland | This gland secretes thyroxin which contains iodine |
| Adrenal Gland | Located on the top of each kidney |
| Adrenalin | Increases the blood sugar level and accelerates the heart and breathing rate |
| Insulin | Facilitates the entrance of glucose into the cells |
| Glycogen | Insulin lowers blood sugar levels by promoting |
| Glucagon | Stimulates the release of sugar from the liver and into the blood |
| Diabetes | When the pancreas fails to produce enough insulin |
| Testes | Secrete testosterone which influences the development of the male secondary sex characteristics |
| Ovaries | Secrete estrogen which influences the development of secondary sex characteristics |
| Negative Feedback | Operates on the principle that the level of one hormone in the blood stimulates or inhibits the production of another hormone |
| Feedback mechanism | Occurs when the level of one substance influences the level of another substance or activity of another organ |
| Dynamic equilibrium | Another name for homeostasis |
| Target cell | cell that has receptors for a specific hormone |
| Receptor molecule | molecules on the surface of the cell that recieve hormones |
| Female sex hormones | estrogen and projesterone |
| Male sex hormone | Testosterone |
| Adrenaline | The adrenal glands make this hormone when you are under STRESS |
| Hormone | Chemical message secreted by endocrine glands |
| Feedback mechanism | Hormones are controled by the process |
| Lock and Key | Target cells can only accept molecules of the correct shape. This is like a ? |
