Angiotensin II is generated from Angiotensin I by ACE primarily in which location?

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Multiple Choice

Angiotensin II is generated from Angiotensin I by ACE primarily in which location?

Explanation:
ACE activity is highest on the endothelium of pulmonary capillaries, so as Angiotensin I travels through the bloodstream it is rapidly converted to Angiotensin II in the lungs. The pulmonary bed provides the largest site of ACE expression, making the lungs the primary location for this conversion before Ang II enters systemic circulation. While ACE is present in other tissues, the lung’s abundant endothelial ACE drives the predominant formation of Ang II. This conversion is part of the broader renin-angiotensin system, with Ang II then acting systemically to cause vasoconstriction and stimulate aldosterone release.

ACE activity is highest on the endothelium of pulmonary capillaries, so as Angiotensin I travels through the bloodstream it is rapidly converted to Angiotensin II in the lungs. The pulmonary bed provides the largest site of ACE expression, making the lungs the primary location for this conversion before Ang II enters systemic circulation. While ACE is present in other tissues, the lung’s abundant endothelial ACE drives the predominant formation of Ang II. This conversion is part of the broader renin-angiotensin system, with Ang II then acting systemically to cause vasoconstriction and stimulate aldosterone release.

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