Biology 1104 the endocrine system

Biology 1104 the endocrine system - Lecture 19: Hormones...

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Lecture 19: Hormones and the Endocrine System Tuesday April 5 th , 2010 - This is a negative feedback (a change in Ca2+ moves Ca2+ levels in the opposite direction) - If Ca2+ levels get too high calcitonin is released from the thyroid. If Ca2+ gets too low parathyroid hormone (PTH) is released from the parathyroid. - Illustrates antagonistic pairs: Hormones working to impact the same parameter but with opposite effects. - Often work on the same effectors. - The receptor here is the pancreas. Works as an integrator too. The effectors are the kidneys, intestines, and bones. - For the brain diagram here -> consider the anti-diuretic hormone. - CQ1: Imagine an athlete forgets to drink enough water before her game. What will happen to ADH and the kidneys? o ADH not released: kidneys reabsorb less water. o ADH not released: kidneys reabsorb more water. o ADH released: kidneys reabsorb less water. o
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Biology 1104 the endocrine system - Lecture 19: Hormones...

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