Final answer:
Angiotensin-converting enzyme (ACE) is an enzyme produced by the lungs that converts inactive angiotensin I into active angiotensin II. ACE inhibitors are used to lower blood pressure.
Step-by-step explanation:
Angiotensin-converting enzyme (ACE) is an enzyme produced by the lungs that catalyzes the reaction of inactive angiotensin I into active angiotensin II. This conversion is vital in regulating systemic blood pressure and kidney function. ACE inhibitors are sometimes prescribed to lower blood pressure in individuals with hypertension.