Hormones and Behavior

Hormones and Behavior - Hormones and Behavior BRW: Chapter...

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Hormones and Behavior BRW: Chapter 5 Tuesday, February 9, 2010
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Hormones are chemicals secreted from specialized cells into the blood and transported to distant sites where they act on target tissues and produce speciFc physiological e f ects. Aristotle ( 4th century B.C.E. ) described e f ects of castration of birds on reproduction and sexual characteristics. Tuesday, February 9, 2010
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Diversity of Chemical Communication ( a ) Synaptic communication ( b ) Autocrine communication: The released hormone acts on the releasing cell itself. ( c ) Paracrine communication: The released hormone di f uses to nearby cells through extracellular space. ( d ) Endocrine communication: The released hormone travels through the bloodstream to target organ. ( e ) Pheromone communication: The hormone is released outside of the body to a f ect other individuals of the same species. ( f ) Allomone communication: The chemical is released to a f ect individuals of other species. Tuesday, February 9, 2010
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The frst true endocrine experiment: Berthold ( 1849 ) The basic strategy: Removal and replacement Tuesday, February 9, 2010
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Some principles of hormone action When hormones inFuence behavior, they do so by changing the probability of evoked behaviors, rather than acting as an on/o f switch. Relationship between hormones and behavior is reciprocal. Hormone levels vary rhythmically throughout the day.
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This note was uploaded on 04/29/2010 for the course PSYCH 002 taught by Professor Freeman during the Spring '08 term at University of Iowa.

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Hormones and Behavior - Hormones and Behavior BRW: Chapter...

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