they remove urea from the blood,adjust salt levels in the blood and adjust water content in the blood
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where is the water reabsorbed?
the collecting duct
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describe ultrafiltration in the bowman's capsule.
blood form the renal artery flows through the glomeruls; high pressure builds up which squeezes water,urea,salts and glucose out of the blodd and into the bowman's capsule.
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composition of the glomerular filter.
membranes between the blood vessels in the glomerulus and the bowman's capsule act like filters so big molecules like proteins and blood cells are not squeezed out, the filtered liquid formed is known as the glomerular filtrate
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where is water reabsorbed into the blood from?
the collecting duct
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where does selective reabsorption of glucose occur?
In the proximal convoluted tubule.
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what is the hormone that regulates water content of the blood?
The anti diuretic hormone.
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what does ADH do?
it makes the nephrons more permeable so more/ less water is reabsorbed back into the blood.
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what is osmoregulation?
It is when the body has to constantly balance the water coming in against the water going out.
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where does ADH come from?
the pituitary gland in the brain.
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what is negative feedback?
the process of osmoregulation is controlled by the mechanism ( negative feedback)
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what happens when the body ia dedydrated?
brain detects water loss , pituitary gland releases more ADH and makes the kidney reabsorb more water .
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what happens when the body is over hyrdrated ?
the brain detects water gain , the pituitary gland releases less ADH which means the kidney reabsorbs less water.
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