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Yes, it is possible.
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∙ 7y ago
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Why is it important that ions being transported across a cell membrane be shielded from the interior of the lipid bilayer?
Because the ions are charged, indicating high polarity, which lipids do not possess; they're hydrophobic, and therefore ions cannot pass through the lipid bilayer since lipids are highly unpolar, unless through an ion channel, which has a higher polarity
What is an important of the phospholipids in the cell membrane?
They can form a lipid bilayer. The lipid bilayer is the barrier that keeps ions, proteins and other molecules where they are needed and prevents them from diffusing into areas where they should not be.The phospholipids help the cell maintain its internal aqueous environment. (Apex)
Why do you think diffusion of ions through these channels is generally a slower process than diffusion through the lipid bilayer?
Nope. It Is diffusion
Ionophores are small hydrophobic molecules that can partition into the lipid bilayer and increase their permeability to specific inorganic ions what is a channel forming ionophore?
gramicidin A
The plasma membrane is a bilayer of lipid molecules with protein molecues embedded True or False?
it depends on what you are referring to. the lipid bilayer is exactly what it says.it is two layers compsed of lipids. lipid molecules have two properties: a hydophobi tail and a hydrophilic head. so when the bi layer is put together, it has the tails facing eachter and the heads out to react with water conditions in the body. the membrane is also embedded with proteins of all dffierent kinds that allows ions to cross and this allows for cell communication
What does the lipid bilayer molecules do?
The lipid bilayer that forms the cellular membrane forms an effective semi-permeable membrane. The lipid bilayer typically can typically exclude larger molecules based on size (molecular weight) and other molecules based on charge (ions and salts).
What does this phrase mean globular proteins that span the lipid bilayer?
I believe the 'lipid-bilayer' refers to the membrane of a cell. A globular protein is something that takes on a roughly spherical shape. In cells proteins span the outside of a cell to the inside to help with the diffusion of molecules or especially ions that do not diffuse directly through the membrane.
What materials crossed the membrane and why did they cross?
Materials that can cross the cell membrane include small non-polar molecules like oxygen and carbon dioxide, as well as small polar molecules like water. These molecules can freely pass through the lipid bilayer of the membrane due to their small size and compatibility with the hydrophobic environment of the lipid tails. However, larger molecules and charged ions require specific protein channels or transporters to cross the membrane.
The cell membrane contains lipid molecules that?
The cell membrane contains lipid molecules that provide a barrier to the free movement of ions into and out of the cell.
How do fats cross the cell membrane?
Transprot or exchange of ions through the lipid bilayer is done by active transport in which energy is utilized in the form of ATP or in the form of proton motive force. It is usually done as symport i.e. molecules or ions move in same direction or as antiport inwhich ions move in opposite direction.
Why cant polar molecules and ions diffuse across the cell membrane?
Ions cannot diffuse through a phospholipid bilayer because they are not able to dissolve in lipids, hence the phosphoLIPID bilayer . Also, since they have an electrical charge, they are repelled by the membrane.
Why don't ions pass through cell membran?
Only small and uncharged particles can pass through the nonpolar part of the membrane interior. Ions are charged and won't pass through a membrane by passive diffusion. Certain ions do pass through membranes by other mechanisms, though.
