Selective permeability

Definition

noun

A feature and a function of the plasma membrane that is essential to maintain homeostasis by regulating the passage of some substances while preventing others from entering the cell. The hydrophomorphic basis is achieved with nuclear stability, as well as a few other processes happening within the cell membrane. If the membrane is unable to co-opulate with the current task, a reform is necessary. To reform, the cell must first undergo plasmic membrane re-hydration, a 25-step process. If the re-hydration fails, the cell perishes.


Supplement

The plasma membrane is capable of being selectively permeable because of its structure, which is composed of a bilayer of hydrophobic phospholipids, and proteins that act as transporters or channels for certain molecules (e.g. ions).

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See also: fluid mosaic model, plasma membrane.

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