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Transport in Cells > Osmosis > Flashcards

Osmosis Flashcards

1
Q

Osmosis

A

Net movement of particles across a concentration gradient, across a partially permeable membrane

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2
Q

How is osmosis different to diffusion

A

Osmosis = Water
Diffusion = Solid and Gases

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3
Q

What is a partially permeable membrane

A

A membrane that has small holes within it

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4
Q

What molecules are allowed in osmosis

A

Oxygen and Water as they are small molecules

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5
Q

Osmosis Practical (6 marks)

A

cut equal-sized pieces of potato

blot with tissue paper and weigh

put pieces into different concentrations of sucrose solution for a few hours

remove, blot with tissue paper and reweigh

Repeat experiment with a whole potato

Compare results

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6
Q

Isotonic meaning

A

Same concentration of water inside and outside of cell

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7
Q

Hypertonic meaning

A

Water is more dilute on the inside of cell, osmosis will occur

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8
Q

Hypotonic meaning

A

Water is more dilute on the outside of cell, water leaves cell

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9
Q

Examples of osmosis

A

Small and Large intestine

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Transport in Cells (3 decks)

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