Facilitated diffusion is a type of passive transport that allows substances to cross membranes with the assistance of special transport proteins. Some molecules and ions such as glucose, sodium ions, and chloride ions are unable to pass through the phospholipid bilayer of cell membranes.
Bulk Transport The last kind of cell transport is bulk transport. Bulk transport involves the cell membrane making vesicles to bring materials in and out of the cell. There are two kinds of bulk transport: 1. Exocytosis: moving materials OUT of the cell. 2. Endocytosis: moving materials INTO the cell. There are 2 types of endocytosis: 1.