Biology Essentials - Osmosis Flashcards

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1
Q

What is Osmosis?

A

The movement of water from a dilute solution to a concentrated solution through a semi-permeable membrane

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2
Q

What is a partially permeable memebrane?

A

A emembrane that only allows some molecules to pass through

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3
Q

How is osmosis relevant to Cells in a high water concentration?

A

A cells cytoplasm contains low water concentrations so in a high concentration, the water will move into the cell from high to low

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4
Q

How is osmosis relevant to Cells in a very low water concentration?

A

A cells cytoplasm has a low water concentration, but in a lower concentration, the water will move out of the cell from high to low

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5
Q

How does a plant cell react differently to osmosis when in high water concentrations?

A

Water will enter the cell, but the cell walls will prevent over expansion and bursting. The cell instead becomes swollen

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6
Q

What is the difference between diffusion and osmosis in terms of the medium?

A

Osmosis requires water, whilst diffusion occurs in liquids, solid and gas

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7
Q

What is the difference between diffusion and osmosis in terms of the membrane?

A

Osmosis requires a semi permeable membrane, whilst diffusion does not

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8
Q

What is the difference between diffusion and osmosis in terms of an equilibrium?

A

Only solvent particles can move during osmosis so the solvent is not equal on both sides, whilst each side is equal during diffusion

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