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In the renin-angiotensin-aldosterone mechanism, __________ . a. decreased blood pressure prompts the release of renin from the liver b. aldosterone prompts increased urine output c. aldosterone prompts the kidneys to reabsorb sodium d. all of the above

Name: Problem 17, Chapter 20: Anatomy & Physiology
Uploaded: 2020-06-29T03:25:08-08:00
Duration: 28 s
Channel: Alexander Burbelo
Description: In the renin-angiotensin-aldosterone mechanism, . a. decreased blood pressure prompts the release of renin from the liver b. aldosterone prompts increased urine output c. aldosterone prompts the kidneys to reabsorb sodium d. all of the above

   In the renin-angiotensin-aldosterone mechanism, __________ .
a. decreased blood pressure prompts the release of renin from the liver
b. aldosterone prompts increased urine output
c. aldosterone prompts the kidneys to reabsorb sodium
d. all of the above

Anatomy & Physiology

J. Gordon Betts,… 1st Edition

Chapter 20, Problem 17

Instant Answer

Solved by Expert Alexander Burbelo

06/29/2020

Step 1

Statement a suggests that decreased blood pressure prompts the release of renin from the liver. However, in the renin-angiotensin-aldosterone mechanism, renin is actually released from the kidneys, not the liver, when blood pressure decreases. Therefore, Show more…

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In the renin-angiotensin-aldosterone mechanism, __________ . a. decreased blood pressure prompts the release of renin from the liver b. aldosterone prompts increased urine output c. aldosterone prompts the kidneys to reabsorb sodium d. all of the above

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Key Concepts

Renin-Angiotensin-Aldosterone System (RAAS)

The RAAS is a critical hormonal cascade that helps regulate blood pressure, fluid, and electrolyte balance in the body. It begins with the release of renin, which converts angiotensinogen into angiotensin I; this is then converted into angiotensin II, a potent vasoconstrictor that also stimulates the secretion of aldosterone from the adrenal cortex. Through these steps, the system increases blood pressure and conserves sodium and water during periods of decreased blood volume or pressure.

Aldosterone Function

Aldosterone is a steroid hormone produced by the adrenal cortex that plays a key role in regulating sodium and water balance. It acts on the kidneys, promoting the reabsorption of sodium (and water following sodium) in the renal tubules, which helps to increase blood volume and blood pressure. This mechanism is essential for maintaining homeostasis, particularly in response to reduced blood pressure or blood volume.

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