The Urinary System Secretes _______, Which is Important in Regulating

Question

The urinary system secretes _______, which is important in regulating blood pressure.
A) renin
B) erythropoietin
C) urea
D) ammonia

Accepted Answer

Renin is an enzyme secreted by the kidneys in response to low blood pressure or low blood volume. It helps to regulate blood pressure by activating the renin-angiotensin-aldosterone system, which causes vasoconstriction (narrowing of blood vessels) and increased retention of salt and water in the body.