The membrane
A+ through nuclear pores
All particles trying to get into the cell must get through the cell membrane. The cell membrane is selectively permeable, which means that it can select what goes in and what goes out. The structure of a cell membrane is called a lipid bilayer, which is two layers of phospholipids.
PROTEIN!!!!!!!!!!!!!!!!!!!!!!!!!
Yes, polar molecules can pass through the cell membrane with the help of specific transport proteins.
Yes, molecules can pass through the cell membrane of human cells through various mechanisms such as simple diffusion, facilitated diffusion, or active transport. The size, polarity, and concentration gradient of the molecule influence how it crosses the cell membrane.
By the cell membrane located on the outside of an animal or plant cell.
The Cell Membrane
A+ through nuclear pores
permeability
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.
cell membrane
permeability
permeability
the cell membrane
Mary Jane Mary Jane
endocytosisfacilitated diffusionexocytosissimple diffusionactive transportpassive transport
They pass through the cell walls and or membranes depending on wether or not its a plant or animal cell. Animal cells have only membranes. Plant cells have both.