Selective permeability

Selective permeability refers to a cell’s ability to control what enters and exits, much like a gatekeeper. The cell membrane allows certain molecules, such as oxygen and nutrients, to pass through while blocking others, like waste or harmful substances. This regulation helps maintain the cell’s internal environment, ensuring it functions properly. The membrane achieves this using specific structures and processes, like tiny channels and transport proteins, that recognize and transport particular substances. Overall, selective permeability keeps the cell healthy and balanced by permitting essential molecules in and removing waste efficiently.