Lecture 15-endo 2 - The Endocrine System Lecture 15 II....

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The Endocrine System Dr. K. Banks E-mail: k.banks@utoronto.ca Lecture 15 II. ADH, Oxytocin & Growth Hormone 1 I. Introduction & Overview III. The Thyroid V. Hormones of Calcium Balance VII & VIII. Hormonal Regulation of Reproduction II. ADH, Oxytocin & Growth Hormone IV. The Adrenal Glands VI. Hormonal Regulation of Energy Metabolism 2 3 Fig. 6.1 Adenohypophysis Neurohypophysis 4 Fig. 6.2a,b
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ADH=Antidiuretic Hormone or Vasopressin 5 Fig. 6.3 Antidiuretic Hormone (Vasopressin) Actions: 1a. Conservation of body water by H 2 O reabsorption at the kidneys 1b. Conservation of blood volume by H 2 O reabsorption at the kidneys 2. Increase in blood pressure by direct vasoconstriction Secreted in response to: 1. Decreased blood pressure 2. Increased plasma osmolarity 6 Antidiuretic Hormone (Vasopressin) & Aquaporin Channels 7 Fig. 19.10 Dehydration Plasma osmolarity [solutes] Blood volume (pressure) PVN signal ADH Conserves body water by H20 reabsorption & Conserves blood volume (pressure) & Blood pressure by vasoconstriction ADH Thirst Drinking Replaces H20 Plasma osmolarity & Blood volume (pressure) == 8
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Lecture 15-endo 2 - The Endocrine System Lecture 15 II....

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