Hormone Action - B. Hormones: chemical diversity - 1....

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Hormone Action: triggered synthesis and/or release - target stimulation - clearance CLICK FIGURE FOR LARGER IMAGE A. Hormones come from secretory cells 1. endocrine glands a. loosely associated secretory cells intermingling with capillaries b. hormone secreted, diffuses to capillary, travels blood to target c. chemically stimulated 2. neurohemal organ a. neurosecretory cells - neurons b. terminate at capillary (instead of another neuron) c. neuronally stimulated (stimulated by other neurons)
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Unformatted text preview: B. Hormones: chemical diversity - 1. peptides (gene products) generally small. . few to 30 amino acids (Eckert p.296) some proteins (200 amino acids or more; e.g. insulin, GH, TSH) 2. modified amino acids epinephrine (adrenaline), norepinephrine (noradrenaline) thyroid hormone (thyroxine - tyrosine dimer) 3. steroids- cholesterol-like progesterone, estrogen, testosterone, aldosterone 4. modified fatty acids prostaglandins...
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This note was uploaded on 11/06/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

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