anatomy Ch20h - Human Anatomy McKinley & O'Loughlin...

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Human Anatomy Chapter 20: The Endocrine System Endocrine System o Endocrine system and the nervous system often work together to bring about homeostasis Endocrine Glands & Hormones o Exocrine glands o Endocrine glands Overview of Hormones o Signaling (communicating) molecules that have an effect on specific organs o target cells o target organs Classification of Hormones o Peptide hormones 1. e.g. growth hormone o Steroid hormones 2. cholesterol 3. e.g. testosterone o Biogenic amines
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4. e.g. thyroid hormone Negative feedback Positive feedback Hypothalamic Control of the Endocrine System o As the master control center of the endocrine system the hypothalamus oversees most endocrine activity. releasing hormones (RH) inhibiting hormones (IH) Hypothalamic Control of the Endocrine System o Hypothalamus produces two hormones that are transported to and stored in the posterior pituitary. 5. oxytocin (OT) 6. antidiuretic hormone (ADH) Pituitary Gland (Hypophysis) o Lies inferior to the hypothalamus o Connected to the hypothalamus by a thin stalk, the infundibulum o Partitioned both structurally and functionally into an anterior pituitary (adenohypophysis) and a posterior pituitary (neurohypophysis) Control of Anterior Pituitary Gland Secretions
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This note was uploaded on 05/11/2011 for the course BIOL 20 taught by Professor Staff,m during the Spring '08 term at Fresno City College.

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anatomy Ch20h - Human Anatomy McKinley & O'Loughlin...

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