AP BIOLOGY

Detailed explanation-1: -The cell does this by controlling the flow of ions into and out of the cell. For example, the cell maintains high concentrations of potassium ions inside the cell and a high concentration of sodium ions outside the cell. This helps the cell maintain an electrochemical gradient necessary for other forms of transport.

Detailed explanation-2: -Diffusion is the movement of particles from high concentration to low concentration in a substance. This process is essential for life on Earth, allowing for the movement of molecular compounds into and out of the cell.

Detailed explanation-3: -Thus, homeostasis is a form of cell regulation. Without cellular regulation, cells would not be able to control their water concentrations, temperatures, and acidities, and cells would die.

Detailed explanation-4: -To maintain homeostasis, unicellular organisms grow, respond to the environment, transform energy, and reproduce. The cells of multicellular organisms become specialized for particular tasks and communicate with one another to maintain homeostasis.