Canadian Society for Medical Laboratory Science (CSMLS) Practice Exam

In which form is urine primarily excreted from the body?

1. Gel

2. Fluid

3. Solid

4. Vapor

The correct answer is: Fluid

Urine is primarily excreted from the body in fluid form. This is due to its composition, which mainly consists of water along with various dissolved substances such as electrolytes, urea, creatinine, and other metabolic byproducts. The fluid nature of urine is essential for efficient waste elimination, allowing the body to regulate hydration and solute balance effectively. The process of urination involves the kidneys filtering blood and forming urine, which is then stored in the bladder until it is excreted. The fluid form facilitates this process, enabling the body to expel waste products easily and maintain homeostasis. Furthermore, the ability to concentrate or dilute urine based on hydration levels reflects the body's adaptive mechanisms, highlighting the importance of urine being in a liquid rather than solid or gaseous state.