unit 2 db - 1. Plasma serves 4 functions: isolate the cell...

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1. Plasma serves 4 functions: isolate the cell cytoplasm from the external environment, regulate the exchange of substance between the cytoplasm and the external environment, communicate with other cells, and identify the cell as a particular type in a particular species. Plasma is the outer layer of a cell and is used to hold the cell together. Starr (2006) compares the plasma membrane to the structure of a house: It keeps all of the components inside of it safe and only lets what is invited inside the house through doors or windows. Cooper (2000) stated that the fundamental structure of the membrane is the phospholipids bilaye r. The phospholipids bilayer forms a stable barrier between two aqueous compartments. For of the plasma membrane , these compartments are the inside and the outside of the cell. A cell could not survive without the plasma membrane because there would be nothing regulating what could enter the cell, allowing harmful substances into the cell.
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This note was uploaded on 04/02/2011 for the course SCIE 206 taught by Professor Antoinettegaston during the Spring '10 term at American InterContinental University.

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unit 2 db - 1. Plasma serves 4 functions: isolate the cell...

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