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What molecules are permeable to the cell membrane?
Hydrophobic molecules are permeable to the cell membrane. Anything that is samll and hydrophobic will pass easily. Larger, hydrophilic molecules require a transport protein to allow permeability.
What molecules have hydrophobic and hydrophillc components?
all animal cell membranes
What is a passage of material through a cell membrane that does not allow all type of molecules to pass?
The lipid bylayer of the cell membranes is made of phospholipids which are hydrophilic heads and hydrophobic tails. The phospholipids are impermeable to ions such as salts, so the bilayer contains protein channels that allow the cell to regulate which molecules can enter the cell.
What type of compound would easily diffuse into the cell?
A hydrophobic molecules (such as a steroid molecule) can easily diffuse into the cell
What selects which molecules enter the cell?
Nuclear decide and allow which molecules will be enter in the cell,- Isrg Rajan
Explain how hydrophobic molecules cross cell membranes?
cell membranes are made of a lipid bilayer, molecules with hydrophilic heads and hydrophobic tails. These molecules arrange in parallel lines with the tails facing inwards towards each other and the heads facing outwards towards the water. Hydrophobic molecules are drawn into the lipid bilayer, trying to get away from the water.
What is double layered with molecules that have hydrophobic tails and hydrophilic head it is found in all cell and it controls what enters and leaves the cell?
Cytoplasm
Are polar molecules hydrophillic?
No, non-polar molecules are hydrophobic because they cannot form hydrogen bonds. A good example of this would be a cell membrane. The fatty acids in the lipid bilayer are non-polar and hydrophobic, while the polar ends that face the outside and inside of the cell are hydrophilic.
How do water soluble molecules enter or exit a cell?
Water molecules move by osmosis through the cell membrane which is a selectively permeable membrane. Since the middle of the lipid bilayer is hydrophobic, the movement of water is made possible by water channels or aquaporins in the membrane.
How do fatty acid molecules differ from amino acid molecule?
amino acid molecules are water soluble meaning they cannot enter the cell. Fatty acid molecules CAN enter the cell.
How are amino acid molecules and fatty acid molecules the same?
amino acid molecules are water soluble meaning they cannot enter the cell. Fatty acid molecules CAN enter the cell.
As the concentration of molecules outside a cell increases more molecules will enter the cell?
the molecules are moving down their concentration gradient BACK NEXT
