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Pituitary G land Posterior Lobe

Pituitary G land Posterior Lobe

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Pituitary G land Posterior Lobe

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  1. Pituitary Gland Posterior Lobe By: Elena Seifert & Kristen Thorne Period 8 1/8/14

  2. Location Part of the brain

  3. What type of hormones are produced? ADH (antidiuretic hormone) Oxytocin

  4. How do these hormones affect the body? • ADH- Promotes reabsorption of water by the kidneys • Oxytocin- strongly affects human social interactions, stimulates uterine contractions during childbirth and facilitates breast feeding • AKA the “love hormone”

  5. Maintenance of homeostasis ADH- helps maintain water and electrolyte balance The pituitary and the hypothalamus glands work together to regulate the release of other hormones in the body.

  6. Feedback Mechanisms ADH- when there is not enough water in the blood ADH is secreted so the kidneys reabsorb water (negative feedback) Oxytocin- during childbirth, oxytocin is released to stimulate uterine contraction and lactation from the mammary glands (positive feedback)

  7. Antagonistic Hormones Vasopressin Receptor Antagonist (VRA)- blocks ADH for those with congestive heart failure Atosiban (oxytocin receptor antagonist)- blocks Oxytocin to control emotions and hormones

  8. Disorders • With a damaged or malfunctioning pituitary gland, your body would lose the normal ability to regulate the hormones released by most endocrine glands. • Disorders of the posterior pituitary gland are: • diabetes insipidus • Syndrome of Inappropriate Antidiuretic Hormone Secretion (SIADH)

  9. Diabetes insipidus • Condition where the kidneys are unable to conserve water due to lack of ADH • Symptoms- • Extreme thirst • Excessive urine volume • Treatment- • Medication (vasopressin)

  10. SIADH • Condition where high levels of ADH cause the kidneys to absorb excessive amounts of water. • Symptoms- • Nausea/vomiting • Cramping • Seizures • Coma • Treatment- • Surgery to remove the gland releasing ADH • Medication to block ADH

  11. Sources http://someinterestingfacts.net/wp-content/uploads/2012/12/Pituitary-gland.jpg http://droualb.faculty.mjc.edu/Course%20Materials/Physiology%20101/Chapter%20Notes/Fall%202011/chapter_6%20Fall%202011.htm http://scientopia.org/blogs/scicurious/2009/11/09/oxytocin-starting-with-the-basics/ http://www.emoryhealthcare.org/pituitary/pituitary-gland.html http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20102/bio%20102%20lectures/endocrine%20system/endocrin.htm http://www.frontalpioneer.com/2013/04/adhoxytocinprolactin-podcast.html http://www.drugs.com/drug-class/vasopressin-antagonists.html http://www.lpch.org/DiseaseHealthInfo/HealthLibrary/diabetes/siadh.html http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001415/#adam_000377.disease.symptoms http://www.urmc.rochester.edu/Encyclopedia/Content.aspx?ContentTypeID=90&ContentID=P01974