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The Endocrine System

The Endocrine System. Chapter 39 Coordination of body systems by Chemical control of hormones. NERVOUS ENDOCRINE. Stimuli-response Rapid response Short time Stimuli-response Slow response Lasts long time Both=HOMEOSTASIS. I A. Systems that chemically coordinate the body:.

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The Endocrine System

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  1. The Endocrine System Chapter 39 Coordination of body systems by Chemical control of hormones

  2. NERVOUS ENDOCRINE Stimuli-response Rapid response Short time Stimuli-response Slow response Lasts long time Both=HOMEOSTASIS I A. Systems that chemically coordinate the body:

  3. B.Components of the Endocrine system Pituitary Thyroid Thymus Adrenal Pancreas Ovaries Testes 1. Glands make ? Hormones or chemical messengers 2. Travel through ? Blood stream (Ductless glands) 3. To where ? Specific Target Organs

  4. Feedback thermostat . . . . . . .

  5. High Blood sugar Pancreas makes insulin Sugar enters the cells Blood sugar lowered Low Blood sugar Pancreas makes glucagon Sugar leaves the liver Blood sugar is increased Feed back loop . . . . . . .

  6. High Blood sugar Glucagon Releases Sugar From liver Pancreas makes Insulin Cell needs sugar Low Blood Sugar = Sugar goes into the cell

  7. 2 Categories of Hormones • Steroid Hormones • Non-Steroid Hormones

  8. IIA.Hypothalamus: Brain area that controls the Master Gland: Pituitary Also controls oxytocin for uterus contraction & ADH for water balance in the kidneys

  9. Pituitary:The Master Gland that controls other endocrine glands Makes • TSH Thyroid stimulating hormone for metabolism • LH & FSH for Reproduction • GH Growth hormone • ACTH hormone • Oxytocin • Prolactin • ADH • MSH

  10. Thyroid: controls metabolism with thyroxine hormone • Pituitary gland controls the thyroid with TSH • Iodine is important for the thyroid tissue • Goiter results from lack of iodine • Also releases calcitonin

  11. Parathyroid Thymus

  12. Adrenal Medulla makes epinephrine & norepinepthrine • Adrenal gland sits on top of the kidney • Controls “fight or flight” response • Superhuman strength @ adrenaline

  13. Pancreas: Regulates sugar balance • Insulin = sugar into cells • Glucagon = sugar leaves the liver

  14. Insulin sources for diabetics : • From domestic livestock • Genetically engineered bacteria

  15. Examples of hormones & glands... • Mammary glands prolactin • Ovaries make estrogen • Testes make testosterone • Adrenal make adrenaline

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