14 Methods

14 Methods - Why Study Hormonal Control of Sexual Behavior...

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Why Study Hormonal Control of Sexual Behavior? Precise timing  – fertility requires temporal coordination in behavioral system  Sexually differentiated Evolutionary impact  – affects reproductive output => involves fundamental level at  which natural selection operates ‘Pro’social behavior  – requires cooperation of another individual => modifiable by social  context & by state of individual
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Assessing Endocrine Function Early Techniques:  Remove gland Replace gland or treat animal with gland extract  Link disease symptoms to autopsies showing gland degeneration Problems: Impossible for animals to survive removal of certain organs Not all H-producing tissues exist in defined, ‘removable’ glands Hard to isolate H without changing them chemically Interactions between H complicate interpretation  Bioassays:   determine strength or biological activity of a substance by testing effects on a test  organism (or culture of living cells) and comparing results against some agreed  standard.
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Assessing Endocrine Function Recent techniques:   e.g. bioassay of LH by measuring its ability to stimulate T secretion by Leydig cells of 
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14 Methods - Why Study Hormonal Control of Sexual Behavior...

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