Cells and Osmosis.

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Presentation transcript:

Cells and Osmosis

Permeable - allowing liquids or gases to pass through it

Cells and Osmosis Can you explain: 1) Making tea with a tea bag 2) Air freshener/diffuser 3) Smelling perfume These examples spread through space/water.

Cells and Osmosis I have an egg here that has been soaking in vinegar for two days. What do you notice? I’m going to find the mass of this egg. Who wants to help? What do you think will happen if I soak the egg in kyro syrup? Vinegar Kyro Syrup Water

Cells and Osmosis Click here!

Cells and Osmosis Osmosis is the diffusion of water through a semi-permeable membrane. Semipermeable means that only certain substances can pass through. The presence of a solute (sugar, salt, etc.) decreases the water potential of a substance.

Cells and Osmosis

Cells and Osmosis Which way will the water flow? (DRAW ME!)

Cells and Diffusion

Cells and Diffusion Hypertonic solutions are those in which more solute (lower water potential) is present. Hypotonic solutions are those with less solute (higher water potential). Isotonic solutions have equal (iso-) concentrations of substances. Water potentials are equal; although there will still be equal amounts of water movement in and out of the cell, the net flow is zero.

Cells and Diffusion Cells placed in distilled water (hypotonic solution) take on water, swell and burst. In a salt solution (hypertonic solution), cells lose water and shrink.