Ribosomes
* granules containing protein and rRna
* site of protein synthesis
* free ribosomes synthesize soluble proteins
* membrane-bound ribosomes synthesize proteins to be incorporated into membranes

Endoplasmic Reticulum (ER)
* interconnected tubes and parallel membranes enclosing cisternae
* continuous with the nuclear membrane
* 2 varieties - rough/smooth ER

Golgi Apparatus
* stacked & flattened membrane sacs
* functions in modification, concentration, and packaging of proteins
* transport vessels from the ER fuse with the cis face of the Golgi apparatus to the trans face
* secretory vesicles leave the trans face of the Golgi stack and move to designated parts of the cell

Discuss the structure and function of ribosomes, the endoplasmic reticulum, and the golgi apparatus including functional relationships among the organelles.