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Jennifer50
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#1
How does water cross a plasma membrane? Can it just diffuse through like oxygen?
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MrMcBants
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kkboyk
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#3
(Original post by Jennifer50)
How does water cross a plasma membrane? Can it just diffuse through like oxygen?
How does water cross a plasma membrane? Can it just diffuse through like oxygen?
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Jpw1097
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#4
(Original post by Jennifer50)
How does water cross a plasma membrane? Can it just diffuse through like oxygen?
How does water cross a plasma membrane? Can it just diffuse through like oxygen?
No, it cannot diffuse through like oxygen. Oxygen is non-polar and so is lipid-soluble, it can just dissolve in the phospholipid bilayer and cross the membrane with ease.
Hope that helps.
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MrMcBants
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(Original post by kkboyk)
Water passes through the nuclear pores by osmosis (which is basically diffusion, except its the movement of water down a water potential)
Water passes through the nuclear pores by osmosis (which is basically diffusion, except its the movement of water down a water potential)
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Jennifer50
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zombiejon
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#7
(Original post by Jennifer50)
Are the aquaporins always open?
Are the aquaporins always open?
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Jennifer50
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zombiejon
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#9
(Original post by Jennifer50)
How do they open and also are they protein channels?
How do they open and also are they protein channels?
Usually remain open due to tertiary protein structure.
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Jennifer50
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#10
So exactly what are they classified as and also I read somewhere that they are water bound, what does that mean?
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zombiejon
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#11
(Original post by Jennifer50)
So exactly what are they classified as and also I read somewhere that they are water bound, what does that mean?
So exactly what are they classified as and also I read somewhere that they are water bound, what does that mean?
Not sure what the term water bound means in relation to an aquaporin.
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Jennifer50
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zombiejon
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#13
Constantly open. Probably has a hydrophilic core in order for h2o to pass through, rather than go through the hydrophobic core of tbd the plasma membrane.
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