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Vasoconstriction in the blood vessels increases peripheral resistance, which...

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Aldosterone is released by the adrenal glands

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This occurs because of increased water channels, or increased Na absorption. Less water is lost in the urine, and urine becomes concentrated

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ADH or antidiuretic hormone is responsible for the insertion of aquaporins or water channels into the collecting duct in the kidneys.

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Angiotensin I is converted to Angiotensin II in the lungs by ACE

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Angiotensin I is converted to Angiotensin II in the lungs by ACE

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Angiotensin II has wider reaching effects on blood volume and pressure

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Angiotensin II has wider reaching effects on blood volume and pressure

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Renin is an enzyme and converts Angiotensinogen to Angiotensin I

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Renin is an enzyme and converts Angiotensinogen to Angiotensin I

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Leads to an increase in Renin release from the kidneys

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Leads to an increase in Renin release from the kidneys

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Leads to a higher BP - which restores the blood pressure back to normal

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Leads to a higher BP - which restores the blood pressure back to normal

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Lower urine output - higher blood volume

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Lower urine output - higher blood volume

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Changes to blood volume are the main mechanism for homeostatic change to blood pressure over the long term

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When the kidneys aren't filtering as much blood, urine production slows down, leading to reduce urine output

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When there is a lower blood pressure and hence volume, less blood is filtered in the kidneys

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When there is a lower blood pressure and hence volume, less blood is filtered in the kidneys

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This is called the glomerula filtration rate (GFR), and this drops because less blood is entering the glomerulus.

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Kidney can detect a drop in blood pressure

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Kidney can detect a drop in blood pressure

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There are cells called the juxataglomerula apparatus that surround the afferent arterioles feeding the glomerulus detect the stretch on the walls of the blood vessel. When there is less blood and a lower blood pressure, this is detected.

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Homeostatic mechanisms kick in when blood pressure changes in order to restore blood pressure to normal levels