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What cell may transport a substance if the substance is too large to cross the membrane?
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∙ 11y ago
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∙ 12y ago
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How do most molecules cross the cell membrane?
Diffusion or if the molecules are too large they go through the transport proteins.
What large molecules are unable to cross the plasma membrane?
A process in which some substance are too large to pass through the membrane is endocytosis
What type of molecules need more help to get through the membrane and What is help them?
Large or polar molecules typically need more help to get through the membrane. They rely on specialized transport proteins such as channels or carriers to facilitate their passage. These transport proteins create pores or binding sites that allow the molecules to cross the membrane.
How does a cell move a molecule that is too large transport proteins?
The cell membrane folds around the molecule.
When is active transport needed?
When large materials are being transported through the membrane
How do most molecules cross the cell membrane?
Diffusion or if the molecules are too large they go through the transport proteins.
How do molecules that are too large to cross the membrance enter into the cell?
If the large molecule won't pass through the membrane by diffusion, it might be dragged through the membrane by "endocytosis".
Some materials can move across the cell membrane against a concentration gradient by?
Large molecules such as glucose that cannot cross the phospholipid bilayer can still move across the membrane through transport proteins by active transport. Active transport uses energy to move molecules the bilayer.
What large molecules are unable to cross the plasma membrane?
A process in which some substance are too large to pass through the membrane is endocytosis
What is diffusion and facilitated diffusion?
Facilitated diffusion is a process whereby a substance passes through a membrane with a aid of an intermediary or a facilitator. The facilitator is an integral membrane protein that spans the width of the membrane. The force that drives the molecule from one side of the membrane to the other is the force of diffusion. and Diffusion is the process of movement of a substance from the region of higher concentration to the region of lower concentration so as to spread uniformly. Difference : Facilitated diffusion is when polar or charged molecules cross the cell membrane through a trans membrane channel protein. Diffusion is when small, non-polar molecules cross the cell membrane directly through the lipid bilayer. they can do so as they are hydrophobic and hence can pass through the hydrophobic core of the lipid bilayer. crossing the lipid bilayer is difficult for charged/polar particles as they are hydrophilic and large (as they may have hydration shells due to their charged nature), hence they have to cross through transport proteins.
What type of molecules need more help to get through the membrane and What is help them?
Large or polar molecules typically need more help to get through the membrane. They rely on specialized transport proteins such as channels or carriers to facilitate their passage. These transport proteins create pores or binding sites that allow the molecules to cross the membrane.
How are active transport and passive transport different from each other?
The most basic difference between active and passive transport is that active requires energy while passive does not. You would require active transport if the substance is going against the concentration of molecules inside and outside of the membrane or if the substance is particularly large. Passive is more for smaller molecules that go with the concentration of the molecules inside and outside of the membrane.
What do transport dos?
Transport proteins help move (or "transport") large molecules that aren't able to pass through a cell's membrane, through said cell membrane through means of diffusion.
How are active and passive differ from from each other?
The most basic difference between active and passive transport is that active requires energy while passive does not. You would require active transport if the substance is going against the concentration of molecules inside and outside of the membrane or if the substance is particularly large. Passive is more for smaller molecules that go with the concentration of the molecules inside and outside of the membrane.
What properties of glucose prevent it from easily crossing a membrane?
because its large and wont cross the membrane
How does a cell move a molecule that is too large transport proteins?
The cell membrane folds around the molecule.
What occurs if substances are too large to pass through the cell membrane by active or passive transport?
passive transport
