Final answer:
Renin is the protein hormone that regulates fluid and electrolyte balance in the body.
Explanation:
Renin is the protein hormone that regulates fluid and electrolyte balance in the body. It plays a key role in the renin-angiotensin-aldosterone system (RAAS) by controlling blood pressure, sodium, and potassium levels. For example, renin helps in maintaining proper blood volume and electrolyte concentrations.
Learn more about Fluid and Electrolyte Balance Regulation here:
https://brainly.com/question/28013934
