AP BIOLOGY

Detailed explanation-1: -Answer and Explanation: The structure most responsible for maintaining cell homeostasis is the cell membrane. The cell membrane is a thin, flexible barrier that protects the cell.

Detailed explanation-2: -Cell membranes enable organisms to maintain homeostasis by regulating the materials that may enter or leave a cell. Some materials easily cross the cell membrane without the input of energy; other materials require energy input in order to cross through the cell membrane.

Detailed explanation-3: -The cell membrane, also known as the plasma membrane, plays an important role in homeostasis via the regulation of the passage of materials into and out of the cell.

Detailed explanation-4: -The membrane’s lipid bilayer structure provides the first level of control. The phospholipids are tightly packed together, and the membrane has a hydrophobic interior. This structure causes the membrane to be selectively permeable.

Detailed explanation-5: -Cellular homeostasis involves maintaining a balance of several factors that make a cell healthy. The cell membrane is a lipid bilayer that prevents that passage of water and ions. This allows cells to maintain a higher concentration of sodium ions out the outside of the cell.