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What a great Q'n. The short non-Answer is that potassium ions also "do not cross" the Cell membrane. The Sodium-Potassium pump system [in Neurons] could not function if Na+ and K+ ions were free to travel unimpeded.
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∙ 13y ago
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∙ 12y agoBecause water is a polar substance. Water has slightly negative pole on the oxygen end and a slightly positive hydrogen end; hence water is known as a dipolar substance. Since the cell membrane has hydrophobic (water hating; does not dissolve in water) it does not allow water to go through its membrane.
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∙ 14y agoSalt can not pass through a cell membrane because its molecules are too big. and a cell membrane is semi=pereable which mean only small particle can get thorugh, such as water.
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∙ 13y agoif you were smart you wouldn't be here and you wouldn't need to use this site... so just study your books and do homework... don't forget to GET OFF THE COMPUTER... bye :) ha ha ha
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∙ 8y agoSalts are not selectively permeable. Membranes do not let them to move free
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∙ 8y agoSalts are ions in water. They are not allowed to move freely
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Glucose is a molecule that can move across the cell membrane if the concentration of glucose is high or inside the cell than outside the cell then what will happen by the process of diffusion?
glucose molecules will diffuse out of the cell. apex
What substance will diffuse through a membrane?
The three substances that can diffuse through a cell membrane are CO2, O2, AND H2O.
When a red blood cell is placed in a hypertonic solution is water the only thing diffusing or will the salt diffuse as well in an attempt to achieve equilibrium?
Just the water moves across the cell membrane in a process called osmosis
If the concentration of glucose is higher inside the cell than the cell then outside the cell then what will happen by the process of diffusion?
Water will move out of the cell. Glucose will not move into the cell without the help of a helper molecule. Glucose molecules will diffuse into the cell.(APEX)
Can oxygen diffuse across a cell membrane?
Yes, how else would our cells obtain oxygen?
How does a high consentration of salt affect cells?
You are looking at a hypertonic solution, where there is a higher amount of salt outside the cell than there is inside the cell. The water inside the cell will diffuse out, which causes the cell to shrink. This is why your fingers shrivel in the bathtub. The opposite will happen in a hypotonic solution. The cell has more salt than the outside, and the water will diffuse into the cell, causing it to swell.
What changes would take place in the chlamydomonas cell if it were transfered to sea water?
As there is a higher concentration of salt in the sea water, salt will diffuse into the cell and this will cause the cell to shrink.
Glucose is a molecule that can move across the cell membrane if the concentration of glucose is high or inside the cell than outside the cell then what will happen by the process of diffusion?
glucose molecules will diffuse out of the cell. apex
What type of compound would easily diffuse into the cell?
A hydrophobic molecules (such as a steroid molecule) can easily diffuse into the cell
What cell type is a reticulosarcoma?
diffuse large cell
How does drinking salt water affect your cell membrane?
i think you mean to ask what effect salt water has on a cell. if you were to introduce a cell into an environment that has a higher salt concentration that its own internal concentration, you would create a concentration gradient (difference). water would diffuse across the cells membrane OUT of the cell and into the external environment in a process called osmosis, in an attempt to even out the differences in concentration by diluting the outside saltier environment. the result would be a shrivelled more "dehydrated" or hypertonic cell.
What substance will diffuse through a membrane?
The three substances that can diffuse through a cell membrane are CO2, O2, AND H2O.
When is a cell most likely to diffuse into a cell when?
I believe the answer is when it is uncharged.
In Osmosis does salt diffuse through a membrane?
Yes
What will not diffuse through the cell membrane?
Glucose
Does water diffuse towards an area with more salt or less salt?
water follows sodium
If the concentration of glucose is higher inside the cell than the cell then outside the cell then what will happen by the process of diffusion?
Water will move out of the cell. Glucose will not move into the cell without the help of a helper molecule. Glucose molecules will diffuse into the cell.(APEX)
