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What has a more vigorous effect on cell membranes acid temperature or alcohol?
Alcohol affects the permeability of the cell membranes. It would have the most vigorous effect.
What ions are most permeable in neuron plasma membranes?
Neuron plasma membranes are most permeable to potassium ions (K+) due to the presence of leak potassium channels. This allows for the resting membrane potential to be closer to the equilibrium potential for potassium. Sodium ions (Na+) and chloride ions (Cl-) also play roles in membrane potential, but potassium ions have the highest permeability.
Which statement most accurately describes the relationship between the permeability and fluidity properties of phospholipid bilayers and their structure?
The permeability and fluidity of phospholipid bilayers are influenced by their structure. Phospholipid bilayers with more unsaturated fatty acids are more fluid and permeable due to the presence of double bonds, which creates kinks in the tails and prevents close packing. Additionally, bilayers with cholesterol have reduced permeability but maintain fluidity by regulating the packing of the phospholipids.
What is the solubility theory of membrane permeability?
the solubility theory of membrane permeability simply describes that a membrane can only be freely permeable to substances that can dissolve in it. this was the most basic theory posed to explain how substances passed through membranes of cells. another way of explaining this is that substances that can freely or passively diffuse across membranes when they have the same chemical or physical properties as the membrane.
What are the two most important characteristics of the lipid bilayers found in cell membranes?
The two most important characteristics of lipid bilayers in cell membranes are their selective permeability, which controls the passage of molecules in and out of the cell, and their fluidity, which allows for flexibility and dynamic movement of molecules within the membrane.
Cell membranes are asymmetrical which is a most likely explanation?
Cell membrane proteins are determined as the membrane is being packaged in the ER and Golgi. or The two sides of a cell membrane face different environments and carry out different functions.
Are biological membranes symmetrical?
Most biological membranes are asymmetrical
The substance which limits the permeability of the blood-air barrier most is?
water
How can you tell by looking at structure which molecules are 'most reduced' or 'most oxidized'?
The molecules that are most reduced will have the most number of hydrogens and the molecules that are most oxidized will have more oxygens around them. For example an Alkane is the most reduced followed by alkene, aldehyde, alcohol, ketone, carboxylic acid and carbon-dioxide is the most oxidized organic compound.
What kind of molecule makes up most of your cellular membranes?
A double layer of phospholipids makes up most of your cell membranes.
What components of membranes are the most abundant?
Cholorestol
What do most cell membranes contain?
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