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Endocrine Systems

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  1. Endocrine Systems • Introduction to Cell Signaling • Chemistry of Messengers • Traditional Hormones • Pituitary • Thyroid • Hormones in Invertebrates

  2. Hormones • Effective in small amounts 10-7 M • Blood Clearance in minutes to hours • Small amounts may have a priming effect (up regulation) • Prolonged exposure to high concentrations can cause desensitization (down regulation) • High doses may affect other receptors

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