Unit 2 Lab 1 Essay

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Unit 2 Lab1 Transport Across the Plasma Membrane GE258 Anatomy and Physiology I Allonah Podvin April1, 2015 The structure of the plasma cell membrane allows it to regulate changes with the extracellular environment. In order to regulate these changes, the plasma cell membrane functions in three ways, by importing what it needs and exporting what it doesn’t, and by communicating. There are different types of passage through the cell membrane. Two types of transport process include active transport and passive transport. The plasma cell membrane imports what is needed for the maintenance of the metabolic process of the cell and for normal cell function. A good example of this would be taking in salts. Another process of the plasma cell membrane is exporting. It allows molecules that have been produced out of the cell. A good example of this is cell secretions released in exocytosis. The plasma cell membrane also communicates. When a substance from one cell induces the transport of chemicals across the plasma cell membrane, this may make action potential possible. There are different types of passage through the plasma cell membrane. Some chemicals pass through the membrane’s phospholipid bilayer boundary while others can only pass through with the help of membrane transport proteins. In passive transport, molecules move from high levels of concentration to low. This doesn’t require energy. In active transport, molecules move from low levels of concentration to high. This requires the use of ATP. The plasma cell membrane is a dynamic piece of the cell and contributes to cell function in many ways. It imports and exports using active and passive transport processes, and it communicates to regulate the changes within its extracellular

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