Question

An angiotensinogen is secreted by ______?

• A. Kidneys
• B. Liver
• C. Pancreas
• D. Lungs

Hint:

The liver produces angiotensinogen, while the kidneys and lungs are involved in converting it into active forms.

Answer 1

The Correct Option is B

Angiotensinogen is a glycoprotein secreted by the liver. It is an essential precursor in the renin-angiotensin system (RAS), which regulates blood pressure and fluid balance. The steps include:
Renin, secreted by the kidneys, converts angiotensinogen into angiotensin I.
Angiotensin I is further converted to angiotensin II by angiotensin-converting enzyme (ACE) in the lungs.
Angiotensin II acts as a potent vasoconstrictor and stimulates the release of aldosterone, enhancing sodium and water retention.
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Final Answer: \[ \boxed{\text{Liver}} \]