Fact 1: Vesicle transport requires energy, so it is also a form of active transport.

Fact 2: Proteins leave the ER in transport vesicles 5.

Given the two facts above, answer the question "How do proteins leave the ER?" with the following options: 
- aqueous solution
 - it's state
 - Veins and arteries.
 - Move to another area
 - allow growth
 - active transport
 - It expands
 - movement


 

      active transport   