Endocrine System

Endocrine System - The Endocrine System OBJECTIVES Describe...

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The Endocrine System OBJECTIVES: Describe the location and structure of the pituitary gland , and explain its structural and functional relationships with the hypothalamus . Describe the location and structure of several other endocrine glands, including: Thyroid / Parathyroid glands Adrenal gland Pancreas Several others Identify the hormones produced by each of the endocrine glands and specify the functions of those hormones.
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The Endocrine System Intercellular Communication
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The Endocrine System What are hormones and what do they do? Chemical messengers that travel via bloodstream Bind to RECEPTORS either on surface or or inside target cells Have widely varying effects on target cells * This is all we will cover for Section 16.2 * This is all we will cover for Section 16.2 Receptors on cell membrane of target cells activate SECOND MESSENGERS inside target cell Receptors inside target cells can directly affect genetic machinery
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The Endocrine System Overview of Endocrine Organs
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Hypothalamus and Pituitary Gland Command central of the endocrine system Arcuate & Periventricular nuclei
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Hypothalamus and Pituitary Gland Supraoptic and Paraventricular Nuclei Neurons make hormones Release into bloodstream at capillary bed of POSTERIOR PITUITARY HORMONES INVOLVED: Antidiuretic Hormone (ADH) Antidiuretic Hormone (ADH) • Also called vasopressin • Made in both hypothalamic nuclei • Causes increased water uptake by kidneys Oxytocin (OT) Oxytocin (OT) • Made in both hypothalamic nuclei • IN FEMALES contraction of uterus during labor and milk ejection during suckling • IN MALES contraction of ductus deferens (sperm duct) and prostate gland during ejaculation POSTERIOR PITUITARY POSTERIOR PITUITARY INFUNDIBULUM
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Hypothalamus and Pituitary Gland More complicated for other parts 1. Hypothalamic neurons make RELEASEING HORMONES that get dumped into capillary bed of INFUNDIBULUM (called hypophyseal
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This note was uploaded on 03/20/2008 for the course BIOL 252 taught by Professor Johnson during the Spring '07 term at UNC.

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Endocrine System - The Endocrine System OBJECTIVES Describe...

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