Low Blood Pressure Feedback Loop

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Low Blood Pressure Feedback Loop
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Kidneys are a part of this system as well

• If your blood pressure is too low
• Blood pressure receptors in the juxtaglomerular
  apparatus detect low blood pressure (due to
  dehydration or massive blood loss).
• This is the monitor and the co-ordinating center

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And then

• 2) Special cells in the juxtaglomerular apparatus
  release renin
• So the apparatus is also the effector/regulator

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And then

• 3) Renin, an enzyme, travels in the bloodstream
  and converts the blood plasma protein
  angiotensinogen into another protein, angiotensin.

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And then

• 4) Angiotensin causes the blood vessels to
  constrict (decreases volume and thereby increases
  pressure).
• This causes the adrenal glands (located on top of
  the kidneys) to release aldosterone.

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And then

• 5) Aldosterone causes the distal tubule and
  collecting ducts to increase water and salt
  reabsorption which raises blood pressure and
  blood volume back to normal levels.