Biology Chapter 04-1

Biology Chapter 04-1 - 1 Chapter 4 Section 1 Exchange with...

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Chapter 4 Section 1 - Exchange with the Environment What would happen to a factory if its power were shut off or its supply of raw  materials never arrived? What would happen if the factory couldn’t get rid of its garbage? Like a factory, an organism must be able to obtain energy and raw materials and  get rid of wastes. An organism’s cells perform all these functions. These functions keep cells healthy so that they can divide. Cell division allows organisms to grow and repair tissues. The exchange of materials between a cell and its environment takes place at the  cell’s membrane. To understand how materials move into and out of a cell, you need to know about  diffusion. Everything is made up of tiny moving particles. Particles move from where they are crowded to where they are less crowded.  Diffusion - movement of particles from areas of high density to areas of
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This note was uploaded on 12/15/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

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Biology Chapter 04-1 - 1 Chapter 4 Section 1 Exchange with...

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