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What types of molecules can pass through the plasma membrane easily and which cannot?
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What kind of substance cannot pass through the cell membrane?
lipids, and ribosomeslipids
Do Hydrophobic molecules pass through the fatty-acid region of the plasma membrane easily?
no
Which molecues cross the membrane of a cell easily and which do not?
Non-polar molecules (such as fatty acids, steroid hormones and O2) pass freely through the cell membrane. Small uncharged molecules (such as H2O) also pass freely, but are slower. Large, polar molecules and ions (such as Na+ and K+) do not pass freely. Macromolecules (such as proteins and polysaccharides) do not pass through the cell membrane. Molecules and ions that cannot pass freely through the cell membrane rely on other means, such as protein transporters, to move in to the cell.
What particle can penetrate cell membrane easily?
particles that are small and hydrophobic and semipermeable. hydrophobic ions those that are soluble in lipids-- can easily pass through the membrane. In addition, small molecules like O2can sneak between the phospholipids of the membrane. On the other hand, hydrophilic molecules (like water and glucose) and ions (such as sodium ions and hydrogen ions) cannot pass directly through the phospholipids of the plasma membrane.
Does the size or the speed of a molecule determines whether it can pass through the pores of a membrane?
The speed doesn't necessarily determine the permeability, but the size does. Smaller molecules such as O2 can easily enter the cell while CO2 leaves the cell. There are other criteria that also determines whether a molecule can pass through the plasma membrane such as its solubility. Fat soluble molecules such as steroids can easily pass through the membrane.
What kinds of molecules pass through a cell membrane most easily?
small and hyrdophobic molecules
What kind of molecules can easily pass through a cell membrane?
Small, Non-polar molecules. If the molecule is polar, it sticks to both sides of the membrane, and has to go through selective routes. The easiest to get through is the Non-polar (oxygen and carbon).
What kind of substance cannot pass through the cell membrane?
lipids, and ribosomeslipids
What type of molecules can easily go through your cell membrane or are permeable to the cell membrane?
Substances with a hydrophillic-lipophillic balance are permeable through the cell membrane.
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.
Molecules A and B are both organic molecules found in many cells when tested it is found that molecule A cannot pass through a cell membrane but molecule B easily passes through state one way the two?
The molecules differ in size. B must be smaller than A because it can diffuse through the semipermeable cell membrane.
Do Hydrophobic molecules pass through the fatty-acid region of the plasma membrane easily?
no
Which molecues cross the membrane of a cell easily and which do not?
Non-polar molecules (such as fatty acids, steroid hormones and O2) pass freely through the cell membrane. Small uncharged molecules (such as H2O) also pass freely, but are slower. Large, polar molecules and ions (such as Na+ and K+) do not pass freely. Macromolecules (such as proteins and polysaccharides) do not pass through the cell membrane. Molecules and ions that cannot pass freely through the cell membrane rely on other means, such as protein transporters, to move in to the cell.
Why is it necessary that you digest hydrolyze starchy food?
Sugar molecules are more easily transported through the cell membrane than larger starch molecules.
Small nonpolar hydrophobic molecules such as fatty acids?
Small, nonpolarn hydrophobic molecules such as fatty acids easily pass through a membrane's lipid bilayer.
What particle can penetrate cell membrane easily?
particles that are small and hydrophobic and semipermeable. hydrophobic ions those that are soluble in lipids-- can easily pass through the membrane. In addition, small molecules like O2can sneak between the phospholipids of the membrane. On the other hand, hydrophilic molecules (like water and glucose) and ions (such as sodium ions and hydrogen ions) cannot pass directly through the phospholipids of the plasma membrane.
Does the size or the speed of a molecule determines whether it can pass through the pores of a membrane?
The speed doesn't necessarily determine the permeability, but the size does. Smaller molecules such as O2 can easily enter the cell while CO2 leaves the cell. There are other criteria that also determines whether a molecule can pass through the plasma membrane such as its solubility. Fat soluble molecules such as steroids can easily pass through the membrane.
