Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.



Published on

Published in: Health & Medicine, Technology
  • Be the first to comment


  1. 1. ENDOCRINE SYSTEM<br />
  2. 2. DEFINITION<br />Ductless gland<br />Exerts chemical control over the human body<br />Maintains homeostasis<br />Acts with nervous system to coordinate the body's activities<br />Uses chemical messengers called hormones that are transported by the circulatory system (blood)<br />
  3. 3. HORMONES<br />AMINO ACIDS- simplest form<br />- epinephrine and norepinephrine, oxytocin and vasopressin<br />PROTEIN HORMONES – insulin and gonad<br />STEROID HORMONES- lipids<br />-cortisol, estrogen and testosterone <br />
  4. 4.
  5. 5. NEGATIVE FEEDBACK<br />Chemical control of the body functions <br />When the concentrations of a particular hormone reaches a certain level in the body, the endocrine gland that secreted that hormone is inhibited (the negative feedback) <br />The secretion of that hormone decreases significantly<br />
  6. 6. HYPOTHALAMUS<br />
  7. 7. DEFINITION<br />Inferior part of the diencephalon <br />*DIENCEPHALON- one of the major parts of the brain containing the thalamus and hypothalamus<br /> Control center of all autonomic regulatory activities of the body<br />
  8. 8. Functions:<br />Main function is homeostasis<br />*HOMEOSTASIS - maintaining the body’s internal environment<br />Plays a major role in controlling the secretions from the pituitary gland<br /> * INFUNDIBULUM – connects the floor of the hypothalamus to the pituitary gland<br /> Sends neural and chemical signals to the pituitary gland<br />
  9. 9.
  10. 10.
  11. 11.
  12. 12.
  13. 13. CHEMICAL SIGNALS<br />Releasing Hormones<br /><ul><li>Main purpose is to control the release of another hormone
  14. 14. Stimulates the release of hormones
  15. 15. Capillary bed, portal vein, receptors</li></ul>Inhibitory Hormones<br /><ul><li>Inhibits release of hormones from another structure
  16. 16. convey the hormones through the pituitary stalk into the anterior pituitary</li></li></ul><li>RELEASING HORMONES<br />Thyrotropin-releasing hormone<br /><ul><li> Stimulates the secretion of thyroid-stimulating hormone from the pituitary
  17. 17. Secretion of another pituitary hormone called prolactin
  18. 18. Involved in the control of body temperature</li></li></ul><li>RELEASING HORMONES<br />Gonadotropin-releasing hormone<br /><ul><li>Stimulates the synthesis and release of the two pituitary gonadotropins
  19. 19. Luteinizing hormone (LH)
  20. 20. Follicle-stimulating hormone (FSH)
  21. 21. Stimulates ovulation in the female ovary
  22. 22. Stimulates synthesis of testosterone to maintain sperm cell production </li></li></ul><li>RELEASING HORMONES<br />Adrenocorticotropic hormone<br /><ul><li>Stimulates the adrenal cortex to secrete the hormone, cortisol
  23. 23. Growth hormone-releasing hormone
  24. 24. Stimulates cell metabolism in most tissues of the body causing cells to divide and increase in size
  25. 25. Stimulates growth of bones and muscles</li></li></ul><li>RELEASING HORMONES<br /><ul><li>Oxytocin
  26. 26. Contraction of smooth muscles in the wall of the uterus</li></li></ul><li>Vasopressin<br /><ul><li> Controls the reabsorption of molecules in the tubules of the kidneys by affecting the tissue's permeability</li></li></ul><li>INHIBITING HORMONES<br />Growth hormone inhibiting hormone (GIH)<br /><ul><li>Also known as Somatostatin</li></ul>Prolactin release inhibiting hormone (PIH)<br /><ul><li>also known as Dopamine</li></li></ul><li>