Cell Membrane

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Cell Membrane 2018-06-21T16:02:01+00:00

All cells have a hindrance around them that isolates them from the earth and from different cells. This hindrance is known as the plasma layer, or cell film.

The Plasma Membrane
The plasma membrane is made of a double layer of special lipids, known as phospholipids. The phospholipid is a lipid atom with a hydrophilic (“water-cherishing”) head and two hydrophobic (“water-abhorring”) tails.

The function of the plasma membrane is to control what goes in and out of the cell. Some molecules can go through the cell membrane to enter and leave the cell, but some cannot. The cell is therefore not completely permeable. “Permeable” means that anything can cross a barrier. An open door is completely permeable to anything that wants to enter or exit through the door.The plasma film is semipermeable, implying that a few things can enter the cell, and a few things can’t. Within all phones additionally contain a jam like substance called cytosol

The inside of all cells also contain a jelly-like substance called cytosol. Cytosol is composed of water and other molecules, including enzymes, which are proteins that speed up the cell’s chemical reactions.

Summary
The plasma membrane is formed by a phospholipid bilayer.
The plasma membrane controls what moves inside and outside the cell.
The cytosol is the jelly-like material in which the contents of the cell are suspended.

 

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