Asked by: Aura Osterle
asked in category: General Last Updated: 5th June, 2020

What is the Raas renin angiotensin aldosterone system and what effect does it have on blood pressure?

The reninangiotensin system (RAS), or reninangiotensinaldosterone system (RAAS), is a hormone system that regulates blood pressure and fluid and electrolyte balance, as well as systemic vascular resistance. This increases the volume of extracellular fluid in the body, which also increases blood pressure.

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Consequently, how does renin angiotensin aldosterone system affect blood pressure?

Angiotensin II is a strong hormone and can act directly on blood vessels to increase blood pressure. It has another important function as well—stimulating the release of aldosterone. Aldosterone causes the kidneys to retain both salt and water, which over time increases the amount of fluid in the body.

Beside above, why is Raas activated in hypertension? The RAAS promotes oxidative stress in the brain, further activating the RAAS and augmenting sympathetic outflow. Angiotensin II and aldosterone of peripheral origin act in the brain to activate this cascade, increasing sympathetic outflow and leading to hypertension.

Just so, what organs are involved in the renin angiotensin aldosterone system?

Fountain JH, Lappin SL.

  • Introduction. The renin–angiotensin–aldosterone system (RAAS) is a critical regulator of blood volume and systemic vascular resistance.
  • Organ Systems Involved. The RAAS involves the kidneys, lungs, systemic vasculature, and the brain.
  • Function.
  • Mechanism.
  • Clinical Significance.
  • Questions.

What stimulus activates the renin angiotensin aldosterone system?

Angiotensin II acts via receptors in the adrenal glands to stimulate the secretion of aldosterone, which stimulates salt and water reabsorption by the kidneys, and the constriction of small arteries (arterioles), which causes an increase in blood pressure.

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