1 Membranes separate their contents from the environment. 2  Cell membranes separate the cell contents from its environment, and organelle membranes separate the organelle contents from their environment. 3  Membranes regulate the movement of materials through them.
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Class Inv VGENX VGELX | Class Other VGELX | Class Other VGENX | Class Inv VGENX | Class Inv. About VGENX. The Vanguard Energy Fund is an actively managed fund offering exposure to the global energy sector. It stands out from peers in its Morningstar category, Equity Energy, because it has more holdings in foreign stocks than the category average.