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Yes! K+ or Na+ or exchanged with its specific potassium and sodium pump protein on the membrane.
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∙ 9y ago
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What type of transport does a small molecule enter a cell with help from a membrane protein additional energy is needed to complete this process?
Facilitated
What is the protein that shuttles hydrogen ions in the electron transport chain?
NADH and FADH(subscript)2
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.
What is the function of protein channels?
Channel proteins take specific substances across cell membranes. Molecules passing through the membrane by channel protein is called mediated transport. To transport the substances, the channel protein must be embedded in the total cell membrane.
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
Do ions require a transport protein?
Not in blood, ions are usually quite water soluble.
Why do Ions and polar molecules require transport proteins to enter or leave a cell?
Not necessarily. It helps to be polar because the lipid bilayer is polar and it helps to pull molecules through, but if its a molecule that the cell doesn't want it wont pull it through. Water (a polar molecule) can go through the membrane anywhere but other nutrients need the help of transport proteins.
Definition of solute pumping?
"Solute pumping allows a molecule that cannot regularly cross the lipid bilayer to enter the cell by way of a protein channel, however solute pumping requires ATP to change the shape of the protein channel to allow the molecule to pass through, therefore it is a form of active transport."
What type of transport does a small molecule enter a cell with help from a membrane protein additional energy is needed to complete this process?
Facilitated
What is the protein that shuttles hydrogen ions in the electron transport chain?
NADH and FADH(subscript)2
Why does NaCl not require a transport protein for diffusion?
It does require a transport protein as it disassociates into charged ions and it is not lipid soluble. Only lipid soluble molecules diffuse freely through living membranes.
Is facilitated diffusion type of active transport?
Facilitated diffusion is passive transport as no energy is used, and a protein channel is all that's required. After that it is simple diffusion down a concentration gradient. Anything with the word diffusion in it is passive transport. Diffusion is just the principle of passive transport.
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.
Are ions able to cross the lipid bilayer?
Yes, it is possible.
What is a carrier protein that used ATP to actively transport sodium ions out of a cell and potassium ions into the cell?
That would be the Sodium-Potassium pump. Pretty creative name eh?
What is the diffusion problem how is it solved in eukaryotic cells?
The diffusion problem is based on relative concentrations in and outside of the cell and a lipid bilayer´s permeability to most of the ions essential to cell processes. It is solved by active transport and facilitated diffusion through protein channels and pumps both passively and through the use of ATP. .... I think ...
What transport protein allows ions to pass through the cell membrane?
Ion Channels allows ions to pass through the cell membrane.
