24. A netlike membrane complex of superposed flat saccules with vesicles detaching from its extremities seen is observed during electron microscopy. What is the observed structure called? What is its biological function?
What is being observed is the Golgi complex, or Golgi apparatus. This cytoplasmic organelle is associated with chemical processing and the modification of proteins made by the cell as well as with the storage and marking of these proteins for later use or secretion. Vesicles seen under an electronic microscope contain materials already processed, and which are ready to be exported (secreted) by the cell. The vesicles detach from the Golgi apparatus, travel across the cytoplasm and fuse with the plasma membrane, secreting their substances to the exterior.