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10 Cards in this Set
- Front
- Back
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importance of feedback in the endocrine system
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amplitude modulated (must process it) vs frequency modulated (fast on/off control)
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why is endocrine system designed in layers
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more control built into the system; final target organs are controlled by feedback from released hormone and hormone released from next level above it
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what do thyroid hormones regulate
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basal metabolic rate
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what does the term half life mean in relation to the endocrine system
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how long it takes for a compound to get degraded to 50% in the blood
usually one half life won't take you down to normal hormonal levels, usually takes 3-5 half lives to get it back down to normal levels |
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whats the blood mainly composed of
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water; so things not soluble in water dont travel through the blood well (like steroids, things that are lipid like/not water loving - they get bound up)
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why is bound considered inactive
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has to leave blood and interact with receptors on cell or in nucleus
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excretion of hormones
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metabolism in blood, secretion in kidney, or conjugation by liver and eliminated in bile
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GH actions
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decreased adiposity, increased lean body mass, increased organ size/function, increased linear both
somatotropes = somatic cells that control cell growth in the body growth hormone affects the liver and bones most prominent lack of GH = opposite (small in stature, loss of muscle) |
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stress induced cushings
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osbourne
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why are menstrual cycles cyclic
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increased/decreased receptor levels in the anterior pituitary gland
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