What+is+Diffusion?

=Unit 1 Cells and Systems=

Chapter 1 The cell is the basic unit of life.
1.3 Diffusion, Osmosis,and the Cell Membrane


 * 1.3 What is diffusion** pages 40-41


 * What does diffusion means?**

The movement of the particles to a lower concentraded area from a higher one is called diffusion. Concentrated means the how much substance a specific area contains, the more substance there are, the higher the concentration gets. All particles are always moving around, therefore diffusion happens constanly. Here's an example of diffusion: Someone's baking chocolate chip cookies in the kitchen, and you smell cookies upstairs in your room. The cookies' frangrance had a high concentration in the kitchen, and then the particle spread to your room, a low concentraded area.


 * Diffusion in Selectively Permeable Membrane**

Cell membrane is also referred as a selectively permeable membrane, it has several openings for the materials to pass through. But not all the materials can get through, some materials can while others can't. This is a very important job for the cell membrane. Particles also pass through the membrane if one side of the membrane is highly concentrated. Slowly the particles on both sides of the membrane will be equal, its called equilibrium. Even though the particles will still be moving through the membrane, the amount of particles on both sides will remain the same.


 * **Questions** || **Answers** ||
 * Explain what diffusion is? || The movement of the particles to a lower concentraded area from a higher one is called diffusion. ||
 * What does particle model of matter states? || The particle model of matter states that all particles are constantly moving. ||
 * Where does diffusion happen? || The process of diffusion accurs often in the world around us. ||
 * What does concentration refer to? || Concentration refers to the amount of a substance in a give space. ||
 * What is one of the Cell Membrane's most important functions? || The most important function is that it allows some materials to pass throught but keeps other materials out. ||
 * What is the Cell Membrane called? || Cell membrane is also referred as a selectively permeable membrane ||
 * What can you compare a selectively permeable membrane too? || You can compare a cell membrane to a coffe filter. Hot water moves through the filter, but the coffee grounds do not ||
 * What is a cell membrane? || Cell membrane is also referred as a selectively permeable membrane, it has several openings for the materials to pass through. ||
 * What is one of the Cell Membrane's most important functions? || The most important function is that it allows some materials to pass throught but keeps other materials out. ||
 * What is the Cell Membrane called? || Cell membrane is also referred as a selectively permeable membrane ||
 * What can you compare a selectively permeable membrane too? || You can compare a cell membrane to a coffe filter. Hot water moves through the filter, but the coffee grounds do not ||
 * What is a cell membrane? || Cell membrane is also referred as a selectively permeable membrane, it has several openings for the materials to pass through. ||
 * What can you compare a selectively permeable membrane too? || You can compare a cell membrane to a coffe filter. Hot water moves through the filter, but the coffee grounds do not ||
 * What is a cell membrane? || Cell membrane is also referred as a selectively permeable membrane, it has several openings for the materials to pass through. ||
 * What is a cell membrane? || Cell membrane is also referred as a selectively permeable membrane, it has several openings for the materials to pass through. ||