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Chemical Signals 2

Chemical Signals 2. BIOL 1407. Endocrine Glands. Hormone-secreting cells make up endocrine system Ductless glands Secrete into blood Receptors on target cells. Hypothalamus-Pituitary Axis. Hormones Released from Posterior Pituitary. Relationship of Hypothalamus and Anterior Pituitary.

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Chemical Signals 2

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  1. Chemical Signals 2 BIOL 1407

  2. Endocrine Glands • Hormone-secreting cells make up endocrine system • Ductless glands • Secrete into blood • Receptors on target cells

  3. Hypothalamus-Pituitary Axis

  4. Hormones Released from Posterior Pituitary

  5. Relationship of Hypothalamus and Anterior Pituitary Hypothalamus

  6. Example: Control of Release of T3/T4 Levels of T3/T4 fall below minimum range Receptor on Hypothalamic Neuron

  7. Thyroid Gland • Calcitonin • Ca regulation • T3 and T4 • Metabolic rate • Other effects: • Nervous • Reproductive • Muscle • Heart & blood pressure • Digestive system • Development • Diagram Credit: US Government, Wikimedia Commons

  8. T3/T4: Tadpole Metamorphosis

  9. Control of Ecdysis • Ecdysis in Crustacean: http://www.youtube.com/watch?v=qACc82n6ODE • Photo Credit: Macau500, 2004, Wikimedia Commons

  10. Brain Hormone (BH) = PTTH (Prothoracicotropic Hormone)

  11. The End Unless otherwise specified, all images in this presentation came from: Campbell, et al. 2008. Biology, 8th ed. Pearson Benjamin Cummings.

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