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15 cards from this deck
Process controlling water & mineral ion balance in body
Maintain constant internal environment
Water moves in by osmosis, cells swell & burst
Water moves out by osmosis, cells shrink & dehydrate
Change triggers response that reverses initial change
Hypothalamus
Changes in blood concentration
Anti-Diuretic Hormone
Pituitary gland
Kidneys (collecting ducts)
Makes collecting ducts more permeable to water
More water reabsorbed, concentrated urine, smaller volume
Reduced/less ADH released
Less water reabsorbed, larger volume of dilute urine
Negative feedback mechanism
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