In many cell types secretory vesicles are continually fusing with the plasma membrane

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In many cell types secretory vesicles are continually fusing with the plasma membrane. The membrane surface of the vesicles is added to the plasma membrane. Despite the addition of this extra area of membrane to the plasma membrane, the surface area of the cell remains essentially stable. Explain. (3) I Trace a molecule of a lysosomal protein from its point of synthesis on a ribosome in the cytosol, to its ?nal destination in a lysosome (2). 0 Explain recycling of marmose-6 phosphate receptors .(2)