a certain type of specialized cell contains an unusually large amount of rough endoplasmic reticulum (er). which of the following functions is this cell type most likely specialized to perform? responses the production and secretion of steroids the production and secretion of steroids the destruction of toxic materials produced in other cells of the organism the destruction of toxic materials produced in other cells of the organism the synthesis of polysaccharides for energy storage the synthesis of polysaccharides for energy storage the production and secretion of proteins\