Spherical or tubular membranes which separate the material present in endoplasmic reticulum from that of cytoplasmic material are called__________? March 18, 2020 – by admin Spherical or tubular membranes which separate the material present in endoplasmic reticulum from that of cytoplasmic material are called__________? A. Cytosol B. Cisternae (Correct) C. Polysomes D. Cristae