Final answer:
Membrane proteins are transferred from the ER to other cell regions through vesicular transport, moving inside vesicles and differing from facilitated diffusion or active transport.
Step-by-step explanation:
The way membrane proteins are transferred from the ER to other regions of the cell is through vesicular transport. Unlike facilitated diffusion and passive transport, which involve the movement of molecules across cell membranes down their concentration gradients, vesicular transport involves the movement of substances within tiny sac-like vesicles. The process includes budding off from the ER and being transported to the Golgi apparatus or other destinations within the cell. This type of transport is different from the movement of substances via passive diffusion, active transport, or facilitated diffusion, which usually involves proteins that act as carriers or channels facilitating the movement of substances across the membrane without the need for vesicles.