The various parts of the endomembrane system serve different functions in the cell. In this activity, you will identify the each part of the endomembrane system. Drag each function to the appropriate bin. Solution Smooth ER- lipid synthesis, calcium ion storage, poison detoxification Rough ER- Protein synthesis, Golgi apparatus- protein modification and sorting, cisternal maturation Lysosomes- macromolecule digestion, autophagy Explanation: The endomembrane system comprises of a system of membranes that form a developmental and functional unit within the cell. They exchange materials through vescicle transport..