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BY: ELENA SEIFERT & KRISTEN THORNE PERIOD 8 1/8/14 Pituitary Gland Posterior Lobe
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Location Part of the brain
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What type of hormones are produced? ADH (antidiuretic hormone) Oxytocin
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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”
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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.
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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)
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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
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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)
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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)
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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
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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://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://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%20 102%20lectures/endocrine%20system/endocrin.htm http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20102/bio%20 102%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.diseas e.symptoms http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001415/#adam_000377.diseas e.symptoms http://www.urmc.rochester.edu/Encyclopedia/Content.aspx?ContentTypeID=90& ContentID=P01974 http://www.urmc.rochester.edu/Encyclopedia/Content.aspx?ContentTypeID=90& ContentID=P01974
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