Active transport is the process by which dissolved molecules move across a cell membrane from a lower to a higher concentration.
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What is the definition of Osmosis?
Osmosis is the movement of water molecules through a partially permeable membrane from a low concentration to a high concentration until equilibrium is reached.
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What is the definition of Diffusion?
Diffusion is the process by which particles of a substance spread out from each other, moving from a region where they are in high concentration to a region of low concentration.
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What are common features of exchange surfaces?
having a large surface area for greater exchange – achieved by having a folded surface AND having a thin exchange surface for a short diffusion distance.
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How are Villi adapted for the maximum absorption of digested food molecules?
the folded villi greatly increase the surface area of the intestine
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Other cards in this set
Card 2
Front
What is the definition of Osmosis?
Back
Osmosis is the movement of water molecules through a partially permeable membrane from a low concentration to a high concentration until equilibrium is reached.
Card 3
Front
What is the definition of Diffusion?
Back
Card 4
Front
What are common features of exchange surfaces?
Back
Card 5
Front
How are Villi adapted for the maximum absorption of digested food molecules?
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