How does active transport help a cell to maintain the critical biological balance known as homeostasis?

Answer 1

Active transport is the movement of molecules from an area of low concentration to an area of high concentration using energy (typically in the form of ATP).

Homeostasis refers to how lviing things maintain a balance between the internal environment and external environment - whether that is inside and outside of a cell, blood vessels, or the body.

Examples

1. Active transport is vital to maintaining the balance of ions across the cell membrane of neurons, which allows them to generate electrical signals -- without active transport, your neurons would not be able to fire repeatedly.
2. Active transport allows substances lost in urine to be reabsorbed in the proximal tubule of the kidney before being released, even though they move against the concentration gradient.