1. Hormones & The Endocrine Glands
10.1 & 10.2

2. Image from: http://leavingbio

3. Hormones
chemicals produced by cells in one part of the body that regulate processes in another part of the body
endocrine glands secrete hormones directly into the blood (exocrine glands into ducts)

4. Endocrine vs. Nervous
both systems integrate and control organs and tissues
nervous system helps body to adjust quickly to changes
endocrine system maintains control over longer periods of time

5. Types of hormones
protein hormones are amino acid chains and are water-soluble; diffuse well through blood and fluids
steroid hormones are derived from cholesterol and are soluble in blood when combined with hydrophilic carrier proteins

6. Water-Soluble Hormones
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7. Animation…
Narrated animation of water-soluble (protein) hormones. Specific example of using cAMP to activate proteins in the target cell:

8. Fat-Soluble Hormones
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9. Animation… Narrated animation of steroid hormone action:

10. Image from: http://bio1152. nicerweb. com/Locked/media/ch45/endocrine

11. Image from: http://www.mayoclinic.com/health/medical/IM00643

12. Hypothalamus part of the nervous system
produces neurohormones which diffuse into the blood and travel to the pituitary gland

13. Pituitary Gland “master gland”
secretes hormones that control other endocrine glands
under the nervous control of the hypothalamus

14. Pituitary Gland
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15. Anterior Pituitary
neurohormones from the hypothalamus stimulate or inhibit release of hormones
produces, stores & releases:
prolactin (PSH)
growth hormone
tropic hormones (TSH, ACTH, FSH, LH)
melanocyte-stimulating hormone MSH

16. “Intermediate Lobe” not very developed in humans
releases endorphins, “natural painkillers”
endorphins function in the nervous system in pathways that control pain)

17. Posterior Pituitary
stores and releases hormones produced by the hypothalamus:
anti-diuretic hormone (ADH)
oxytocin
ADH reabsorption of water in distal convoluted tubule
Inhibited by alcohol & caffeine
Oxytocin: childbirth, milk release

18. Image from: http://www.khrissysdogwalkers.com/contest.php

19. Image from: http://www. thyroiduk. org

20. Image from: http://www.mayoclinic.com/health/medical/IM03488

21. Image from: http://www. nichd. nih

22. Image from: http://healinghaven. typepad