The Cell and Its Membrane

The Cell and Its Membrane - The Cell and Its Membrane

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The Cell and Its Membrane The  cell  is the basic functional unit of all living things. The plasma membrane (cell membrane)  bounds the cell and encloses the nucleus (discussed presently) and  cytoplasm.  The cytoplasm  consists of specialized bodies called organelles suspended in a fluid matrix, the cytosol, which  consists of water and dissolved substances such as proteins and nutrients.  The plasma membrane The  plasma membrane  separates internal metabolic events from the external environment and  controls the movement of materials into and out of the cell. The plasma membrane is a double  phospholipid membrane (lipid bilayer), with the nonpolar hydrophobic tails pointing toward the inside  of the membrane and the polar hydrophilic heads forming the inner and outer faces of the membrane  (Figure 1).  Proteins and cholesterol molecules are scattered throughout the flexible phospholipid membrane. 
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This note was uploaded on 11/10/2011 for the course PT 101 taught by Professor Staff during the Spring '10 term at Texas State.

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The Cell and Its Membrane - The Cell and Its Membrane

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