Membranes160-page12 - Movement of materials into the cell...

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Membrane Structure and Function - 12 Membrane Interactions with the Environment Larger substances may require changes in membrane shape and the fusion of the plasma membrane with vesicles containing the substances to successfully move the needed substance. Such changes in membranes occur throughout the lifetime of the cell, so that membrane sections are constantly being formed and reformed in the cell. Movement out of the cell involving changes of the membranes and formation of vesicles is exocytosis.
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Unformatted text preview: Movement of materials into the cell is endocytosis. Exocytosis Materials can be exported from the cell by fusing vesicles with the plasma membrane, a process called exocytosis. For example, insulin, made in cells of the pancreas, leaves the cells of the pancreas by exocytosis. Endocytosis Substances that enter the cell in this manner move by endocytosis. There are a variety of endocytosis processes: pinocytosis, receptor mediated endocytosis and phagocytosis....
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