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Endocrine System

Explore the major glands of the endocrine system and how they produce hormones to regulate various bodily functions. Learn about steroid and nonsteroid hormones and their mechanisms of action.

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Endocrine System

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  1. Endocrine System

  2. 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

  3. Steroid Hormones 1) Diffuses into target cell 2) Attaches to receptor inside the cell 3) Hormone enters the nucleus 4) Proper protein created

  4. Nonsteroid Hormones

  5. 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

  6. 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

  7. cold hormone A hormone B hormone C

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

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