OSMOSIS AND SURFACE AREA TO VOLUME RATIO. The net movement of atoms, ions or molecules down a...

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OSMOSIS AND SURFACE AREA TO VOLUME RATIO

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Page 1: OSMOSIS AND SURFACE AREA TO VOLUME RATIO. The net movement of atoms, ions or molecules down a concentration gradient. Movement is from: High Low.

OSMOSIS AND SURFACE AREA TO VOLUME RATIO

Page 2: OSMOSIS AND SURFACE AREA TO VOLUME RATIO. The net movement of atoms, ions or molecules down a concentration gradient. Movement is from: High Low.

Diffusion

The net movement of atoms, ions or molecules down a concentration gradient.

Movement is from: High Low

Page 3: OSMOSIS AND SURFACE AREA TO VOLUME RATIO. The net movement of atoms, ions or molecules down a concentration gradient. Movement is from: High Low.
Page 4: OSMOSIS AND SURFACE AREA TO VOLUME RATIO. The net movement of atoms, ions or molecules down a concentration gradient. Movement is from: High Low.

Question

Are molecules moving after equilibrium is established?

Page 5: OSMOSIS AND SURFACE AREA TO VOLUME RATIO. The net movement of atoms, ions or molecules down a concentration gradient. Movement is from: High Low.

Equilibrium

There is no net movement of materials.

When the concentration is equal on both sides.

**different from equilibrium of reaction (in chemistry) where the rate of the forward rxn=rate of reverse rxn

Page 6: OSMOSIS AND SURFACE AREA TO VOLUME RATIO. The net movement of atoms, ions or molecules down a concentration gradient. Movement is from: High Low.

Osmosis

Diffusion of water. Water moving from an area if its

high concentration to an area of its low concentration.

No cell energy is used.

Page 7: OSMOSIS AND SURFACE AREA TO VOLUME RATIO. The net movement of atoms, ions or molecules down a concentration gradient. Movement is from: High Low.

Tonicity

Solute CANNOT cross membrane

Concentration of water outside the cell relative to the water inside the cell. 1. Isotonic (same)2. Hypotonic (higher [H2O] OUTSIDE the

cell)3. Hypertonic (higher [H2O] INSIDE the

cell)

Page 8: OSMOSIS AND SURFACE AREA TO VOLUME RATIO. The net movement of atoms, ions or molecules down a concentration gradient. Movement is from: High Low.

Predict the NET movement of WATER for each solution*The membrane does not allow the solute to pass through the membrane

Hypotonic – net movement into the cellIsotonic – no net movementHypertonic – net movement out of the cell

Page 9: OSMOSIS AND SURFACE AREA TO VOLUME RATIO. The net movement of atoms, ions or molecules down a concentration gradient. Movement is from: High Low.
Page 10: OSMOSIS AND SURFACE AREA TO VOLUME RATIO. The net movement of atoms, ions or molecules down a concentration gradient. Movement is from: High Low.

What happens when you drink salt water?

What would the effect be of increasing the amount of salt in oceans on marine life?

Page 11: OSMOSIS AND SURFACE AREA TO VOLUME RATIO. The net movement of atoms, ions or molecules down a concentration gradient. Movement is from: High Low.
Page 12: OSMOSIS AND SURFACE AREA TO VOLUME RATIO. The net movement of atoms, ions or molecules down a concentration gradient. Movement is from: High Low.

Why Are Cells So Small?

• Cell volume to surface area ratios favor small size.

• Nucleus to cytoplasm consideration (control).

• Metabolic requirements.• Speed of diffusion.

Page 13: OSMOSIS AND SURFACE AREA TO VOLUME RATIO. The net movement of atoms, ions or molecules down a concentration gradient. Movement is from: High Low.

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DIFFUSION & OSMOSIS - nbed.nb.caweb1.nbed.nb.ca/sites/ASD-W/GeorgeSt/Teachers/Documents/2019 Os… · Osmosis and Diffusion 2018.notebook 3 Osmosis is the spontaneous movement of

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