Osmosis and Diffusion Passive TransportPassive Transport Please pause to answer all questions asked during this video.Please pause to answer all questions.

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Presentation transcript:

Osmosis and Diffusion Passive TransportPassive Transport Please pause to answer all questions asked during this video.Please pause to answer all questions asked during this video. Record all answers on the paper provided.Record all answers on the paper provided.

Prediction In the box provided predict what this diagram would look like after a period of one hour. In the box provided predict what this diagram would look like after a period of one hour.

Passive Transport There are two types of passive transport: There are two types of passive transport: Diffusion Diffusion Osmosis Osmosis

Diffusion Diffusion is a form of passive transport. Diffusion is a form of passive transport. Molecules “diffuse” or move down the concentration gradient until an equilibrium is reached. Molecules “diffuse” or move down the concentration gradient until an equilibrium is reached. What is a concentration gradient? What is a concentration gradient? There are two different concentrations to consider: There are two different concentrations to consider: Concentration of solvent (Water) Concentration of solvent (Water) Concentration of Solute (What is dissolved or suspended in solvent Concentration of Solute (What is dissolved or suspended in solvent GIF of Diffusion of food coloring in water. Due to random movement of water molecules. Molecules move due to energy. What do you think would happen if the water was heated? Rate of diffusion would increase.

Osmosis Cell membrane is a semipermeable membrane. Cell membrane is a semipermeable membrane. Cells use a separate process called active transport to move larger molecules in and out of the cell. Cells use a separate process called active transport to move larger molecules in and out of the cell. Water (solvent) outside of the cell will move from high concentration of solvent to low concentration of solvent. Water (solvent) outside of the cell will move from high concentration of solvent to low concentration of solvent. Osmosis is another form of passive transport. Osmosis is the diffusion of water molecules across a semipermeable membrane. What is a semipermeable membrane?

Osmosis Example of Semipermeable membrane and 2 Sugar water concentrations Example of Semipermeable membrane and 2 Sugar water concentrations Make a drawing to predict what will happen after an hour. Make a drawing to predict what will happen after an hour. Make a drawing to predict what will happen after an hour.

Osmosis Another example of osmosis using a cell Another example of osmosis using a cell Make a drawing to predict what will happen after an hour. Make a drawing to predict what will happen after an hour.

Prediction Same diagram as first prediction Same diagram as first prediction Look back at the prediction you made in box one. Was your prediction correct, why or why not?

Effects of Osmosis

Example with Cells Example with Cells

Effects of Osmosis Example with Cells Example with Cells