the structure that regulates the passage of material into and out of this bacterial cell is indicated by the letter . a bacterial cell consisting of definite structures that are labeled from a to e. the surface is labeled a. the tiny fibrils on the cell surface are labeled b. the layer under the cell surface is labeled c. the area in the center of the cell contains a specific matter and is labeled d. the few long fibrils on the cell surface are labeled e. the structure that regulates the passage of material into and out of this bacterial cell is indicated by the letter . a bacterial cell consisting of definite structures that are labeled from a to e. the surface is labeled a. the tiny fibrils on the cell surface are labeled b. the layer under the cell surface is labeled c. the area in the center of the cell contains a specific matter and is labeled d. the few long fibrils on the cell surface are labeled e. a b c d e