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.
Through proteins in the membrane.
The cells go through the cell's membrane
Cell Membrane
Water.
When large materials are being transported through the membrane
Through proteins in the membrane.
The membrane
The cells go through the cell's membrane
Yes, materials move into the nucleus through pores in the nuclear membrane.
membrane
Cell Membrane
Materials enter and leave the nucleus through the selective membrane. The membrane always controls what leaves and enters the nucleus.
This sort of membrane is said to be semipermeable.
Membrane transporter.
It doesn't! it just lets some materials that are useful for the cells into the membrane and others out, through diffusion.
diffusion and osmosis
endoplasmic reticulum