Which of the following is NOT a function of the urinary system?

The urinary system plays several crucial roles in maintaining homeostasis within the body, including regulating hydration levels, excreting waste products, and producing certain hormones.

Regulating hydration levels involves the kidneys filtering blood to adjust the volume of water excreted through urine, which balances the body's fluid levels. The kidneys also remove waste products, such as urea and creatinine, from the bloodstream, ensuring that toxins and excess substances are eliminated. Additionally, the urinary system has a role in hormone production, particularly hormones like erythropoietin, which stimulates red blood cell production, and renin, which helps regulate blood pressure.

In contrast, storing energy is not a function of the urinary system. Energy storage is primarily managed by the body's adipose tissue and the liver, which store fats and carbohydrates, respectively. Thus, indicating that storing energy does not pertain to the physiological tasks of the urinary system.