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Endocrine System. Endocrine System Overview. Glands: Major organs of the endocrine system Glands makes hormones Hormones: chemical signals Hormones move through bloodstream Hormone attaches to cell receptor Target cells produce proteins. Steroid Hormones. 1) Diffuses into target cell
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Endocrine System Overview • Glands: Major organs of the endocrine system • Glands makes hormones • Hormones: chemical signals • Hormones move through bloodstream • Hormone attaches to cell receptor • Target cells produce proteins
Steroid Hormones 1) Diffuses into target cell 2) Attaches to receptor inside the cell 3) Hormone enters the nucleus 4) Proper protein created
Major Glands • All the below create hormones • Hypothalamus • Stimulates the pituitary gland to release hormones • Controls growth, reproduction, body temp • Pituitary gland • Controls cell growth • Stimulates other glands • Thyroid gland • Regulates metabolism, growth, development • Thymus • Allows WBCs to mature to fight infection
Major Glands • Adrenal Glands • Controls “fight or flight” response • Increases breathing, alertness, blood pressure • Epinephrine • Pancreas • Controls glucose level in blood • Insulin, glucagon • Gonads: influence sexual development • Testes (males): testosterone • Ovaries: Estrogen, progesterone
cold hormone A hormone B hormone C
hypothalamus Pituitary gland Thyroid thymus Adrenal glands pancreas ovaries testes