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Diffusion, Osmosis, and Active Transport: Summary questions.
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<strong>Diffusion, Osmosis, and Active Transport:</strong> Summary
questions.
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<p class="mainIdea">
You have explored how water and ions can diffuse both passively
and actively through cell membranes. Please answer the questions
below to summarize what you have learned.
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Which best describes the motion of an INDIVIDUAL ion or molecule:
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It moves from high to low concentration.
It moves from low to high concentration.
It moves completely randomly through collisions.
<html>It moves in a direction that depends on its environment.</html>
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Describe in as many ways as possible how you know when a system has
reached equilibrium:
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<p class="question">
Describe what will happen if a cell has an oxygen concentration that is
higher outside of the cell compared with inside of the cell (see
illustration to the right):
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The oxygen will move from high to low concentration.
The oxygen will move from low to high concentration.
<html>The concentrations will remain the same because you need a pore for oxygen to go through the membrane.
<html>Oxygen will go in both directions but faster from the higher concentration area.</html>
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<p class="question">
Describe how surface area affects the speed at which diffusing ions or
molecules reach equilibrium across both sides of the surface:
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<p class="question">
Which of the following can pass through a cell membrane without a
specialized pore:
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positive ions
negative ions
small non-polar molecules like carbon dioxide
small polar molecules like water
medium to large molecules
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<p class="question">
If you were to drink salt water from the ocean which has a high
concentration of dissolved ions, what would happen?
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<html>The high salt concentration outside of my cells would cause water to leave my cells, making me dehydrated.</html>
<html>The high salt concentration outside of my cells would cause too much water to go into my cells, making them burst.</html>
<html>The high salt outside of my cells would diffuse into my cells, causing too many ions to be present inside of my cells.</html>
<html>The low salt concentration inside my cells would diffuse out, bonding with the high salt concentration outside of my cells.</html>
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<p class="question">
Describe how you can make an electric potential occur across a membrane,
and how you can maximize this potential energy:
</p>
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<strong>You have reached the end of the activity.<br>Please submit a
report.</strong>
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Create a report of my work.
Diffusion, Osmosis, and Active Transport
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