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Does hydrophilic substance have an easier time passing through membranes than do hydrophobic substance?
Wiki User
∙ 9y ago
It has a harder time passing through. The inside of the membrane is hydrophobic, so something hydrophilic (water-loving), will not be liked by the hydrophobic (water-fearing) membrane.
Wiki User
∙ 9y ago
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Describe how the diffusion of ions across a cell membrane differs from the diffusion of nonpolar molecules across the cell membrane?
Ions need to be facilitated through a cell membrane because they are passing through a phospholipid bilayer with a hydrophobic interior. Non polar molecules are also hydrophobic, so they can pass through the membrane easily if they are small enough. Ions are polar, so they have a hard time passing through membranes.
While conducting an experiment you discover a certain substance passing out of a cell by diffusion what might you conclude about the concentration of this substance?
penatration.
What can you conclude about the advantage of the cell membrane having hydrophobic ends in the phospholipid bilayer?
Well it prevents polar molecules from passing through freely, giving the membrane its semi-permeable properties.
The ability to pass through a membrane?
permeability
How do transport proteins move substances across membranes?
Facilitated diffusion (also known as facilitated transport or passive-mediated transport) is a process of passive transport, facilitated by integral proteins. Facilitated diffusion is the spontaneous passage of molecules or ions across a biological membrane passing through specific transmembrane integral proteins. The facilitated diffusion may occur either across biological membranes or through aqueous compartments of an organism.*This is from Wikipedia.....
Describe how the diffusion of ions across a cell membrane differs from the diffusion of nonpolar molecules across the cell membrane?
Ions need to be facilitated through a cell membrane because they are passing through a phospholipid bilayer with a hydrophobic interior. Non polar molecules are also hydrophobic, so they can pass through the membrane easily if they are small enough. Ions are polar, so they have a hard time passing through membranes.
How do fish take in gases?
Fish breath (take in and exchange gasses) by passing water through their gill membranes which do the same job as our lung membranes.
Can all molecules diffuse through all cell membranes?
No, there are specific cell membranes that allow only certain molecules to pass through. Some stay open and others must be opened ( like a gate ).
Passing an electric current through a certain substance produces oxygen and sulfur This substance cannot be a?
Element.
While conducting an experiment you discover a certain substance passing out of a cell by diffusion what might you conclude about the concentration of this substance?
penatration.
Why water molecules cannot diffuse directly through the phosolipids bilayer?
Hydrophobic centre of the phospholipid bilayer prevents non-liquid soluble molecules from passing through.
What can you conclude about the advantage of the cell membrane having hydrophobic ends in the phospholipid bilayer?
Well it prevents polar molecules from passing through freely, giving the membrane its semi-permeable properties.
The ability to pass through a membrane?
permeability
Passing an electric current through a certain substance produces oxygen and sulfur?
it cannot be an element
What is the removal of substance that can be dissolved from rock and soil due to water passing through is called?
LEACHING!
What is the change of state of a substance from to vapor without passing through the liquid state?
it's called sublimation
How does the structure of phospholipids relate to its function?
repels water
