Cell Transport Cell Bio Genetics Mr Foster Cell

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Cell Transport Cell Bio. & Genetics Mr. Foster

Cell Transport Cell Bio. & Genetics Mr. Foster

Cell Transport • Passive – energy not required to move material across membrane –

Cell Transport • Passive – energy not required to move material across membrane – Diffusion – molecules move from high to low concentration to reach equilibrium • http: //www. indiana. edu/~phys 215/lecture/l ecnotes/lecgraphics/diffusion. gif

Cell Transport • Passive Transport (cont) • Osmosis – type of diffusion involving H

Cell Transport • Passive Transport (cont) • Osmosis – type of diffusion involving H 2 O molecules only • VIDEO LINKhttp: //programs. northlandcollege. edu/biology/Bio logy 1111/animations/transport 1. html

Cell Transport (cont. ) • Active – Energy required to move materials across membrane

Cell Transport (cont. ) • Active – Energy required to move materials across membrane Low to High concentration – Ion pumps/Channels- Cl-, Na+, K+, Ca+ – Endocytosis / Exocytosis – membrane forms pockets to move material

Clicker ? ’s 17 -20 Endocytosis / Exocytosis

Clicker ? ’s 17 -20 Endocytosis / Exocytosis

Hypertonic • A hypertonic solution contains a greater concentration of impermeable solutes than the

Hypertonic • A hypertonic solution contains a greater concentration of impermeable solutes than the solution on the other side of the membrane.

H 20 in or out

H 20 in or out

Hypertonic • If a cell is placed in a hypertonic solution, there will be

Hypertonic • If a cell is placed in a hypertonic solution, there will be a net movement of water out of the cell until the concentration of impermeable solutes in the cell equals that of the hypertonic solution.

Hypotonic • A hypotonic solution contains a smaller concentration of impermeable solutes than the

Hypotonic • A hypotonic solution contains a smaller concentration of impermeable solutes than the solution on the other side of the membrane

H 20 in or out

H 20 in or out

Hypotonic • If a cell is placed in a hypotonic solution, there will be

Hypotonic • If a cell is placed in a hypotonic solution, there will be a net movement of water into the cell until the concentration of impermeable solutes in the cell equals that of the hypotonic solution.

Isotonic • An isotonic solution contains an equal concentration of impermeable solutes as the

Isotonic • An isotonic solution contains an equal concentration of impermeable solutes as the solution on the other side of the membrane.

H 20 in or out

H 20 in or out

Isotonic • If a cell is placed in an isotonic solution, there will be

Isotonic • If a cell is placed in an isotonic solution, there will be no net movement of water in or out of the cell because the concentration of impermeable solutes in the cell equals that of the external environment.