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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Other cards in this set
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?
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