Renin-Angiotensin-Aldosterone System (RAAS): Key Components and Functions Questions with Correct Answers (Grade A+)

Renin-Angiotensin-Aldosterone System (RAAS): Key Components
and Functions Questions with Correct Answers (Grade A+)

Question 1: Renin-Angiotensin-Aldosterone System (RAAS)

Answer: A hormone-enzyme system that regulates blood pressure, blood volume, and sodium balance.


Question 2: Renin

Answer: An enzyme released by the kidneys in response to low blood pressure, low sodium, or low renal
perfusion; converts angiotensinogen to angiotensin I.


Question 3: Angiotensinogen

Answer: An inactive protein produced by the liver that is converted into angiotensin I by renin.


Question 4: Angiotensin I

Answer: An inactive peptide formed from angiotensinogen by renin; converted to angiotensin II by ACE.


Question 5: Angiotensin-Converting Enzyme (ACE)

Answer: An enzyme found mainly in the lungs that converts angiotensin I into angiotensin II.


Question 6: Angiotensin II

Answer: A potent vasoconstrictor that increases blood pressure and stimulates aldosterone release.


Question 7: Aldosterone

Answer: A hormone released from the adrenal cortex that increases sodium and water reabsorption and
potassium excretion in the kidneys.


Question 8: Final Effect of RAAS

Answer: Increased sodium and water retention, increased extracellular fluid, vasoconstriction, and increased
blood pressure.


Question 9: Which RAAS hormone stimulates ADH release?

Answer: Angiotensin II stimulates the posterior pituitary to release ADH.



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