Please help. I can't understand what is renin: hormon or enzyme?
Renin is a proteolytic enzyme that cleaves angiotensinogen to angiotensin 1. Renin is part of the renin-angiotensin-aldosterone system, which overall acts to control blood pressure, among other functions. Angiotensin is a hormone, and the whole system can be thought of as a hormone.
Thank you very much for your helpful response. It's been very informative for me.
The renin-angiotensin-aldosterone system (RAAS) is the system of hormones, proteins, enzymes and reactions that regulate your blood pressure and blood volume on a long-term basis.
It regulates your blood pressure by increasing sodium (salt) reabsorption, water reabsorption (retention) and vascular tone (the degree to which your blood vessels constrict, or narrow). The RAAS consists of three major substances, including: a. Renin (an enzyme). b. Angiotensin II (a hormone). c. Aldosterone (a hormone).
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