00:01
Is it true or false for the non -polar tails of phospholipids bury themselves in the interior of the plasma membrane? so this is true.
00:10
A phospholipid has a molecule of glycerol, and attached to that glycerol molecule, there are two non -polar fatty acid tails, and then there's a phosphate group.
00:23
So the phosphate group is negatively charged, and that means that the head is also kind of charged, and therefore very hydrophilic.
00:34
So the head is hydrophilic, and the tails, because they are non -polar, because they're made up of mostly carbon and hydrogen bonds and carbon bonds, they are hydrophobic.
00:46
So non -polar, which means hydrophobic.
00:51
And what it means to be hydrophilic or hydrophobic is whether or not you form attraction with water.
00:58
So water is a polar molecule.
01:00
It has positive and negative poles.
01:02
Well, that's perfect for interacting with something else that has charge.
01:07
So the hydrophilic head forms a lot of interactions with water.
01:12
And there's water outside the cell in the extra similar environment.
01:15
There's water inside the cell...