Selective Permeability

What is selective permeability in the context of cell membranes?

The property of cell membranes that only allows certain molecules to enter or exit the cell.

How does simple diffusion operate?

Simple diffusion is not selective and depends only on the size and hydrophilic or hydrophobic properties of particles.

Which processes can be selectively permeable?

Both facilitated diffusion and active transport can be selectively permeable.

What proteins in the membrane create selective permeability?

Channel and pump proteins

Channel proteints

Facilitated diffusion are specific to one type of particle or group of related particles

Pump proteins

Active transport are specific to particular particles