Diffusion & osmosis

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8 Terms

1
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what is diffusion

net movement of molecules from HIGH SOLUTE concentration to LOW SOLUTE concentration. PASSIVE PROCESS!

  • it evenly spreads solution and occurs until equilibrium is reached

  • want same amount of solution on each side of membrane (no net movement)

<p>net movement of molecules from HIGH SOLUTE concentration to LOW SOLUTE concentration. PASSIVE PROCESS!</p><ul><li><p>it evenly spreads solution and occurs until equilibrium is reached </p></li><li><p>want same amount of solution on each side of membrane (no net movement) </p></li></ul><p></p>
2
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what is osmosis

SPECIAL TYPE OF DIFFUSION

  • passive transport of WATER from LOW solute concentration to HIGH solute concentration

solute= low to high

water= high to low

<p>SPECIAL TYPE OF DIFFUSION</p><ul><li><p>passive transport of WATER from LOW solute concentration to HIGH solute concentration </p></li></ul><p>solute= low to high </p><p>water= high to low </p>
3
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what is tonicity

  • the ability of a solution to make WATER move IN or OUT of a cell

  • related to concentration of solute in solution

    3 TYPES:

  • Hypotonic, isotonic, hypertonic

4
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hypotonic

  • a solution with a LOWER concentration of solute than a cell

  • water will move INTO cell

  • animal cells will burst, plant cells will swell

<ul><li><p>a solution with a LOWER concentration of solute than a cell</p></li><li><p>water will move INTO cell</p></li><li><p>animal cells will burst, plant cells will swell </p></li></ul><p></p>
5
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isotonic

  • solution has same concentration as cell

  • no net movement of water

6
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hypertonic

  • solution has HIGHER concentration of solute than cell

  • water will move OUT of cell

  • animal and plant cells will shrivel

<ul><li><p>solution has HIGHER concentration of solute than cell </p></li><li><p>water will move OUT of cell </p></li><li><p>animal and plant cells will shrivel </p></li></ul><p></p>
7
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surface area to volume ratio

a smaller cell has a higher surface area to volume ratio, making osmosis occur faster

<p>a smaller cell has a higher surface area to volume ratio, making osmosis occur faster </p>
8
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concentration

  • the greater the difference in solute concentration between two sides, the faster osmosis is

<ul><li><p>the greater the difference in solute concentration between two sides, the faster osmosis is </p></li></ul><p></p>

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