Final answer:
Passive transport benefits a cell by facilitating the movement of substances across the cell membrane without energy expenditure, conserving ATP for other vital functions and maintaining homeostasis.
Step-by-step explanation:
Benefits of Passive Transport for Cells
Passive transport benefits a cell by allowing the movement of substances across the cell membrane without the expenditure of cellular energy. Substances move from an area of higher concentration to one of lower concentration through various passive transport mechanisms such as diffusion, osmosis, and facilitated diffusion. By not requiring ATP (adenosine triphosphate), cells conserve energy for other processes that may require energy input, such as active transport, where substances must be moved against their concentration gradient.
Moreover, passive transport relies on the inherent properties of the cell membrane and its integral proteins to facilitate the movement of molecules ranging from gases and lipids to polar molecules like glucose and ions. This efficient system ensures essential molecules like glucose can enter cells using specific protein channels designed for facilitated transport, contributing to the cell's homeostasis. The specificity of such transport proteins ensures that the right substances can enter or leave the cell, maintaining the delicate balance necessary for cell function.