Lecture 12 Endocrine - Human Physiology Endocrinology!...

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Human Physiology Endocrinology! Chapter 11 + chapter 5
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Chapter 11 - endocrine system 1. The endocrine system 2. Hormones Categories of chemical signals Defining characteristics Chemical characteristics 3. How hormones work 4. Hormones and behavior
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The endocrine system is involved in regulating: – homeostasis – growth and development – Reproduction – metabolism Responses to environmental challenges (physical and mental)
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The Endocrine and Nervous Systems Compared Nervous – Discrete signals to separate cells – Can respond very rapidly Endocrine – One signal to many cells – Slower
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The endocrine system is comprised of all glands or organs secreting hormones • Pancreas, adrenals, hypothalamus, kidneys, pituitary, thyroid, ovaries and testes • These regulate and coordinate many body activities including: growth, metabolism, reproduction, blood pressure, electrolyte balance, and others.
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Overview of Human Endocrine System Endocrine glands: Organs or tissues that secrete hormones Hormones: Chemical signals in blood
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Types of Chemical Types of Chemical Communication Communication
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Categories of Chemical Signals • Autocrine signals: act on same cell that secretes them • Paracrine signals: act on neighboring cells • Endocrine signals: hormones carried by blood or other body fluids • Pheromones: released into environment, act on another individual
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Intracrine (regulates intracellular events)
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Autocrine Autocrine (Self Regulation) (Self Regulation)
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Paracrine
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Endocrine Communication
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Ectocrine • Substances are released into the environment to communicate with other individuals. – Dogs/cats marking territory – Human pheromones • Menstrual cycle • Male Pheromones – Moths following concentration gradient
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General concepts of endocrine system: 1. Communication by hormones 2. Regulated by feedback mechanisms 3. The endocrine system talks with the NERVOUS SYSTEM 4. The endocrine control is arranged in axes
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This note was uploaded on 05/07/2010 for the course INTEG BIO 132 taught by Professor Lehman during the Spring '10 term at University of California, Berkeley.

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Lecture 12 Endocrine - Human Physiology Endocrinology!...

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