3. Endocrine System Overview Physically disconnected Controls growth, development, environmental responses Glands: Major organs of the endocrine system –makes hormones –Hormones: chemical signals that move through blood Hormones attach to cell receptor –Cause target cells produce proteins

4. Steroid and Non-Steroid Hormones Naturally produced by the body Travel through blood Attach to receptor of target cells Target cell creates proteins

5. 1988 Summer Olympics: Ben Johnson (Canada) vs. Carl Lewis (USA)

6. YouTube clip: Endocrine system

7. Major Glands Glands create hormones (C) Hypothalamus –S–Stimulates the pituitary gland to release hormones –H–Helps controls growth, reproduction, body temp (B) Pituitary gland –C–Controls cell growth –S–Stimulates other glands (A) Thyroid gland –R–Regulates metabolism, growth, development (D) Thymus –A–Allows WBCs to mature to fight infection

8. (E) Adrenal Glands –Controls “fight or flight” response –Increases breathing, alertness, blood pressure (F) Pancreas –Controls glucose level in blood Gonads: influence sexual development (H) Testes (males): produces testosterone (G) Ovaries: produces estrogen, progesterone

11. Effects of testosterone

12. Pituitary gland Thyroid thymus Adrenal glands pancreas ovaries testes hypothalamus

13. Kobe Kuiz 1)What are glands and what do they release? 2)What do steroid and nonsteroid hormones direct cells to create? 3)Examine the diagram of the endocrine system on slide #9. Practice answering the 8 different glands. 4)Which gland….  releases insulin to lower blood sugar levels?  increases your alertness and blood pressure?  helps your white blood cells mature?  is located atop your kidneys?  are found in your brain (two answers)?  is considered your body’s thermostat?