Hormones

Hormones - Rooster Exp Berthold and Behavioral Endocrinology G1 Removed testes on some => no large wattles no crowning G2 Removed testes and

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Rooster Exp: Berthold and Behavioral Endocrinology G1 - Removed testes on some => no large wattles, no crowning G2 - Removed testes and reimplanted them => normal roosters G3 - Nothing happened, normal roosters --> hormone signaling does not depend on nerve innervation --> chemical signals are used   Hormones provide internal info from the body to the CNS   General Hormone Principles: 1. Act in gradual fashion - activate behavioral/physiological responses hours/weeks later  and may persist for days 2. Change probability/intensity of behavior 3. Environmental factors influence quantities and types of hormones released 4. Each hormone effects different tissues/organs/behaviors 5. Often secreted in bursts => pulsatile secretion 6. Levels vary rhythmically with day/month/year --> many controlled by circadian clocks 7. Hormones interact to create various actions 8. Chemical structure is similar across vertebrates  --> functions vary across species 9. Can only affect cells with receptor that alters cell function --> across vertebrates same brain region often possess same hormone receptors   Reciprocal Relations between hormones and behavior: 1. *Hormones do not cause  behavior any more than behavior causes changes in hormones
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This note was uploaded on 04/05/2008 for the course BIOL 455 taught by Professor Sabrinaburmeister during the Spring '08 term at UNC.

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Hormones - Rooster Exp Berthold and Behavioral Endocrinology G1 Removed testes on some => no large wattles no crowning G2 Removed testes and

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