AP BIOLOGY

Detailed explanation-1: -Homeostasis is a set of stable, internal conditions that a living thing maintains despite any changes in the environment. In order to maintain this orderly state, a cell must spend energy through active transport to pump some molecules out and pump others in.

Detailed explanation-2: -Processes of passive transport play important roles in homeostasis . By allowing the movement of substances into and out of the cell, they keep conditions within normal ranges inside the cell and the organism as a whole.

Detailed explanation-3: -Active transport is the energy-requiring process of pumping molecules and ions across membranes against a concentration gradient. Active transport processes help maintain homeostasis.