LIpid based hormones --> arachadonic acid, and cholesterol based. Sex hormones, Leuk and prostiglandins. Mostly autocrin, peracrin, vs endocrin. \n
Permssive effect -- Insulin makes the mamery glands more sensitive to prolactin. \n\nn biology, permissiveness is a certain relationship between hormones and the target cell. It can be applied to describe situations in which the presence of one hormone, at a certain concentration, is required in order to allow a second hormone to fully affect the target cell. For example, thyroid hormone increases the number of receptors available for epinephrine at the latter's target cell, thereby increasing epinephrine's effect at that cell. Without the thyroid hormone, epinephrine would only have a weak effect.[1]\n
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More rapid response with a PM protien and machinery already to go inside the cell. \nWater soluble hormones cannot! So Fat soluble can go fast and slow. \n
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Close to optic chiasm. \n
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CRH --> MSH --> melanin production\n
Portal system - Vein connecting two capillary beds.\n
T4- 4 iodines on tyrosine. Most produces.\nT3 - Thyroxin, predominate in the body.\nT4 is turned into T3. \nIodide is what we consume, Iodine is what is in our bodies. \n