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Endocrine System. 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
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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
Steroid and Non-Steroid Hormones • Naturally produced by the body • Travel through blood • Attaches to receptor of the target cell • Stimulate protein creation
Major Glands • Glands create hormones • Hypothalamus • Stimulates the pituitary gland to release hormones • Helps 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 • Pancreas • Controls glucose level in blood • Gonads: influence sexual development • Testes (males): produces testosterone • Ovaries: produces estrogen, progesterone
cold hormone A hormone B hormone C
hypothalamus Pituitary gland Thyroid thymus Adrenal glands pancreas ovaries testes
Kobe Kuiz • What are glands and what do they release? • What do steroid and nonsteroid hormones direct cells to create? • Examine the diagram of the endocrine system on slide #9. Practice answering the 8 different glands. • 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?