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Small non-polar molecules can pass through a membrane rapidly.
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∙ 11y ago
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∙ 13y agoGap junctions, I think in stratified squamous.
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∙ 14y agosimple squamous epithelium
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∙ 13y agoSimple Squamous
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∙ 13y agoSimple Squamous
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∙ 13y agoSimple squamous
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∙ 12y agoEndothelium
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What types of molecules can easily go through your cell membrane are permeable to the cell membrane?
Substances with a hydrophillic-lipophillic balance are permeable through the cell membrane.
What types of membrane allow solvent molecules to pass through but do not allow solute molecules to pass through?
A membrane that does not allow substances through is impermeable. One that allows some substances, but not others, is semipermeable or selectively permeable.
Are membranes often perforated by proteins that extend through both sides of the membrane?
Yes - usually to transport molecules of various types either into or out of the cell.
Functions of proteins embedded in the membrane?
There are two types of proteins that are embedded in phospholipid membranes, extrinsic and intrinsic. Extrinsic proteins are only partially embedded in the membrane. They aid the structural stability of the membrane and when in conjunction with glycolipids can be involved in cell recognition. Intrinsic proteins pass all the way through a membrane. Some of them may be channel proteins which act as passages through the membrane for some molecules and ions.
What is process that moves molecules across a cell membrane from regions of lower concentration to higher concentration?
The process that can move molecules from a low to a high concentration through a cell membrane is active transport.
What types of molecules can easily go through your cell membrane are permeable to the cell membrane?
Substances with a hydrophillic-lipophillic balance are permeable through the cell membrane.
What types of molecules are moved in osmosis?
osmosis is the diffusion of particles through a semi-permiable membrane
What types of membrane allow solvent molecules to pass through but do not allow solute molecules to pass through?
A membrane that does not allow substances through is impermeable. One that allows some substances, but not others, is semipermeable or selectively permeable.
What types of molecules can't pass through the cell membrane?
All ionic molecules and all large fat molecules. What can get in (without help) is water and dissolved gases.
What types of molecules have difficulty crossing the plasma membrane?
Large, polar, uncharged molecules cannot pass through a membrane without the help of protein channels embedded into the plasma membrane. Ions also have difficulty passing; they need ATPs.
What is partly permeable?
A membrane, such as the cell membrane, which allows only certain types of molecules (usually small and non charged ones) to pass through it freeely.
Are membranes often perforated by proteins that extend through both sides of the membrane?
Yes - usually to transport molecules of various types either into or out of the cell.
How does a plasma membrane determine selectivity of molecules?
Plasma membrane possesses specific protein channels and lipid bilayer. Protein channels are of million different types, each allow a specific molecule to pass through it regarding its size, shape, charges on it, solubility, etc. Fat soluble molecules pass through lipid bilayer.
What types of molecules diffuse through the cell membranes by facilitated diffusion?
molecules that can survive the hydrophobic interior of the lipid bilayer
Which types of molecules have a primary function of providing a rapidly available energy source for living things?
carbohydrates
What is made up of a mixture of many types of molecules and is very thin and selective permeable?
cell membrane
Functions of proteins embedded in the membrane?
There are two types of proteins that are embedded in phospholipid membranes, extrinsic and intrinsic. Extrinsic proteins are only partially embedded in the membrane. They aid the structural stability of the membrane and when in conjunction with glycolipids can be involved in cell recognition. Intrinsic proteins pass all the way through a membrane. Some of them may be channel proteins which act as passages through the membrane for some molecules and ions.
