the cell's surface area
depend on the kind of cell...... plant: cell wall and cell membrane/plasma membrane animal: cell membrane/plasma membrane
Cell Membrane
The cell membrane, or plasma membrane, regulates the passage of materials into and out of cells through selective permeability. This means that only certain substances are allowed to pass through the membrane, while others are blocked or actively transported. This selective permeability helps maintain the internal environment of the cell and allows for proper function and communication with the external environment.
The cells go through the cell's membrane
Materials pass through the cell membrane, which acts as a barrier between the cell's interior and the external environment. The cell membrane is selectively permeable, allowing certain substances to pass through while blocking others.
What you are considering when you are referring to how easily materials can pass through a membrane is how permeable the cell wall or membrane is.
Dead molecules
It doesn't! it just lets some materials that are useful for the cells into the membrane and others out, through diffusion.
The cell membrane
Cell Membrane
endoplasmic reticulum
permeability