How do the kidneys respond to low blood pressure?

Practice Questions

Q1
How do the kidneys respond to low blood pressure?
  1. Increase urine output
  2. Release renin
  3. Decrease sodium reabsorption
  4. Increase filtration rate

Questions & Step-by-Step Solutions

How do the kidneys respond to low blood pressure?
  • Step 1: The body detects low blood pressure through sensors in the blood vessels.
  • Step 2: The kidneys respond by releasing a hormone called renin into the bloodstream.
  • Step 3: Renin activates a process called the renin-angiotensin-aldosterone system (RAAS).
  • Step 4: This process leads to the production of angiotensin II, which causes blood vessels to narrow (constrict).
  • Step 5: Angiotensin II also stimulates the adrenal glands to release another hormone called aldosterone.
  • Step 6: Aldosterone helps the kidneys retain more sodium and water, which increases blood volume.
  • Step 7: As blood volume increases, blood pressure rises back to normal levels.
  • Renin-Angiotensin-Aldosterone System (RAAS) – The physiological mechanism by which the kidneys regulate blood pressure through the release of renin.
  • Kidney Function in Blood Pressure Regulation – The role of the kidneys in maintaining homeostasis and responding to changes in blood pressure.
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