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How do large molecules like glucose move across the cell membrane?
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∙ 11y ago
By a process called active transport, or endocytosis. There is phagocytosis for particles and pinocytosis for liquids. In both cases, the cell membrane, also called the phospholipid bilayer, engulfs the particle or liquid and then brings in into the cell where lysosomes use digestive enzymes to break it down.
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∙ 13y ago
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∙ 9y agoLarge cells enter the cell in two possible ways. One of them is by protein pumps, which literally pump molecules inside the cell. the second way is by the formation of a vesicle around the molecule, this vesicle is formed when the cell membrane enclosures a molecule that is close to the membrane. Then this vesicle dismembers from the cell membrane and carries it inside the cell, where it is then carried to its destination, which can vary from molecule to molecule.
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∙ 14y agothis happens by bulk transport through two processes called exocytosis and endocytosis
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∙ 14y agolarge particles are packaged in vesicles( which are small membrane sacs) specialized in moving products into,out of and with in a cell.
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∙ 11y agoLarge molecules move across the cell membrane by means of transport proteins embedded in the cell membrane.
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∙ 15y agoThrough endocytosis.
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∙ 10y agoby channel proteins
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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.
How do larger molecules move across epithelial membranes in the capillaries?
Large molecules are transported across a cell membrane by the process of process of exocytosis. This is when secretory vesicles secretes large molecules by the fusion of vesicles with the plasma membrane.
Which organelle has a semi permeable membrane and separates the cell from it's environment?
The cell membrane (or plasma membrane) shows semi-permeability. In short some substances, such as gases and small electrically-neutral molecules CAN pass, while others like glucose and other large polar molecules CANNOT pass. Although glucose and other large polar molecules cannot pass through the semi-permeable cell membrane, they may enter through the interior of transport proteins.
Is the Visking tubing a partailly permeable membrane and why?
Yes, it is a partially permeable membrane. It allows certain substances like glucose and water molecules to diffuse through but not large molecules like starch and sucrose. Selectively permeable.
How do amino acids and glucose move across the cell membrane?
large molecules and charged molecules move across a cell membrane through "facilitated diffusion." That is to say, a transport protein in the plasma membrane of the cell is used (with the aid of adenosine triphosphate, or ATP) to move the substance from one side of the membrane to the other.This method is actually the basis upon which all cell function is based, from generating and using energy, to keeping the cell isotonic to its environment.
What can across the membrane with assistance?
large or polar molecules such as proteins, glucose or ions like Na+/K+
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.
Why do cells need carriers proteins that transport glucose?
Large molecules, such as glucose, are not able to pass through the cell membrane. Therefore proteins are needed to transport them across.
What large molecules need help getting across cell membrane?
In general, molecules that cannot diffuse across the cell membrane are either very large, such as starches and fats, or very polar.
How do larger molecules move across epithelial membranes in the capillaries?
Large molecules are transported across a cell membrane by the process of process of exocytosis. This is when secretory vesicles secretes large molecules by the fusion of vesicles with the plasma membrane.
What substanses like large glucose molecules must use to help them get through the cell membrane?
Peinas
What are the substances that the cell membrane does not allows to pass?
Usually Ions and charged molecules (salts dissolved in water), large polar molecules (glucose), and macromolecules.
What two processes move large packets of molecules across the cell membrane?
osmosis and diffusion
Facilitated diffusion moves large molecules through what?
Glucose and polypeptides.
What molecules will move easily across the cell membrane: large proteins, starch, water, or DNA?
It depends on the membrane, but generally water is the only one that will move across unaided. The rest are too large.
What role do carrier protein play in facilitated diffusion?
it moves large molecules or molecules that are not soluble in lipids across across the cell membrane. (Pg. 101 in science book...1st para.)
Which organelle has a semi permeable membrane and separates the cell from it's environment?
The cell membrane (or plasma membrane) shows semi-permeability. In short some substances, such as gases and small electrically-neutral molecules CAN pass, while others like glucose and other large polar molecules CANNOT pass. Although glucose and other large polar molecules cannot pass through the semi-permeable cell membrane, they may enter through the interior of transport proteins.
