Which of the following is a reason for the kidneys to filter waste?

The kidneys play a critical role in maintaining the body's overall homeostasis, particularly by regulating blood pH balance. They filter the blood and remove waste products, excess substances, and electrolytes, which helps to maintain the acid-base balance necessary for various physiological processes. When the body produces acids or bases, kidneys adjust their excretion to ensure that the blood pH remains within the narrow range required for proper cellular function. This balance is essential not just for homeostasis but also for the optimal functioning of enzyme systems and metabolic processes.

While filtering waste is also involved in other bodily functions, such as hormone production or fluid regulation, the specific role of controlling blood pH balance is fundamental to the kidneys’ function in waste filtration.