Movement in and out of cells.

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  • Created by: Franke
  • Created on: 27-10-14 21:25
What different types of transport are there across cell membranes?
Active transport, diffusion, facilitated diffusion, osmosis, exocytosis, endocytosis.
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What is the role of proteins in the transport of substances across the cell membrane?
Channel proteins allow large molecules through in facilitated diffusion. Carrier proteins allow ions through in facilitated diffusion and also act as pumps in active transport.
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How does bulk transport occur across a cell membrane?
through endocytosis and exocytosis
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How does water potential affect osmosis?
water molecules move from an area of high water potential to an area of low water potential.
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Explain the term Hypotonic?
Hypotonic means having lower osmotic pressure than the other fluid involved.
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Explain the term Isotonic?
Isotonic means having the same osmotic value.
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Explain the term hypertonic?
hypertonic means having a higher osmotic pressure than the other fluid.
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Which process provides the ATP needed for active transport?
respiration.
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what does Fick's law state?
rate of diffusion is directly proportional to area of diffusion surface multiplied by difference in concentration divided by thickness of surface over which the diffusion takes place.
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Card 2

Front

What is the role of proteins in the transport of substances across the cell membrane?

Back

Channel proteins allow large molecules through in facilitated diffusion. Carrier proteins allow ions through in facilitated diffusion and also act as pumps in active transport.

Card 3

Front

How does bulk transport occur across a cell membrane?

Back

Preview of the front of card 3

Card 4

Front

How does water potential affect osmosis?

Back

Preview of the front of card 4

Card 5

Front

Explain the term Hypotonic?

Back

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