The endoplasmic reticulum is made up of membrane-enclosed spaces used for the trafficking of materials.

The endoplasmic reticulum functions in the transport of materials destined to be endocytosed into the cell.

The rough ER is involved in metabolism and lipid synthesis.

The smooth ER contains ribosomes which account for the smooth surface.

Both the smooth and rough ER are directly involved in protein synthesis.

The Golgi apparatus produces some lipids.

The Golgi apparatus receives vesicles from the smooth ER.

The Golgi apparatus modifies contents of vesicles.

The Golgi apparatus repackages contents into vesicles.

The Golgi apparatus sends vesicles to the cell surface to be exocytosed.

The rough endoplasmic reticulum has many ribosomes bound to its surface, but the smooth endoplasmic reticulum does not.

The smooth endoplasmic reticulum has many ribosomes bound to its surface, but the rough endoplasmic reticulum does not.

The rough endoplasmic reticulum and the smooth endoplasmic reticulum both have many ribosomes bound to their surfaces.

Neither the rough endoplasmic reticulum nor the smooth endoplasmic reticulum have any ribosomes bound to their surfaces.