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Solute vs. Solvent Solute: The substance being dissolved Solute: The substance being dissolved Solvent: a liquid capable of dissolving another substance.

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Presentation on theme: "Solute vs. Solvent Solute: The substance being dissolved Solute: The substance being dissolved Solvent: a liquid capable of dissolving another substance."— Presentation transcript:

1 Solute vs. Solvent Solute: The substance being dissolved Solute: The substance being dissolved Solvent: a liquid capable of dissolving another substance (Water is the universal solvent) Solvent: a liquid capable of dissolving another substance (Water is the universal solvent)

2 Permeable vs. Impermeable Permeable – can pass through a substance Permeable – can pass through a substance Impermeable – cannot pass through a substance Impermeable – cannot pass through a substance Semipermeable? Semipermeable?

3 DEMO

4 Diffusion Movement of molecules from an area of high concentration to an area of lower concentration Movement of molecules from an area of high concentration to an area of lower concentration Example: skunk, perfume, night after a dinner at taco bell! Example: skunk, perfume, night after a dinner at taco bell!

5 Diffusion In Action 1/BIOBK/BioBooktransp.html 1/BIOBK/BioBooktransp.html 1/BIOBK/BioBooktransp.html 1/BIOBK/BioBooktransp.html When molecules of a substance are in equal concentrations on both sides of a membrane, the molecules are said to have reached dynamic equilibrium. When molecules of a substance are in equal concentrations on both sides of a membrane, the molecules are said to have reached dynamic equilibrium.

6 DEMO (Perfume) What molecules moved? What molecules moved? What direction did the molecules move? What direction did the molecules move? Location of molecules in the end? Location of molecules in the end?

7 DEMO (Strainer) What molecules moved? What molecules moved? What direction did the molecules move? What direction did the molecules move? Location of molecules in the end? Location of molecules in the end?

8 DEMO (Food coloring) What molecules moved? What molecules moved? What direction did the molecules move? What direction did the molecules move? Location of molecules in the end? Location of molecules in the end? How did heat effect the movement of the molecules? How did heat effect the movement of the molecules? How did cold effect the movement of the molecules? How did cold effect the movement of the molecules?

9 Factors that affect Diffusion Temperature Temperature Size of Particles Size of Particles Concentration of Particles (number of molecules of a substance in a given volume ) Concentration of Particles (number of molecules of a substance in a given volume )

10 Osmosis The diffusion of Water! The diffusion of Water!

11 Why is this important for cells? Capillary

12 Plasmolysis

13 Types of Solutions Hypertonic Solution = higher concentration of water in the cell than outside the cell Hypertonic Solution = higher concentration of water in the cell than outside the cell Hypotonic Solution = higher concentration of water outside the cell than inside the cell Hypotonic Solution = higher concentration of water outside the cell than inside the cell Isotonic Solution = equal concentrations of water inside and outside the cell Isotonic Solution = equal concentrations of water inside and outside the cell

14 Osmosis In Blood Cells

15 Osmosis In Plant Cells

16 Passive Transport Diffusion and Osmosis Diffusion and Osmosis Molecules that are small but too large to pass through the membrane on its own need help from transport proteins. Molecules that are small but too large to pass through the membrane on its own need help from transport proteins.

17 Active Transport Requires energy Requires energy Moves molecules against their concentration gradient (from low concentration to high concentration). Moves molecules against their concentration gradient (from low concentration to high concentration). 08active/index.shtml 08active/index.shtml 08active/index.shtml 08active/index.shtml

18 Endocytosis Process by which a cell surrounds and takes in material from the environment. Process by which a cell surrounds and takes in material from the environment. Pinocytosis Pinocytosis Cell drinking Phagocytosis Phagocytosis Cell eating

19 Exocytosis The expulsion or excretion of materials from the cell. The expulsion or excretion of materials from the cell. 09endoexo/index.shtml 09endoexo/index.shtml 09endoexo/index.shtml 09endoexo/index.shtml

20 Exocytosis

21 Endocytosis and Exocytosis

22 How Cells Eat & Drink


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