00:01
In order to answer this question, let's talk about the sodium potassium atp pump.
00:04
It says the sodium potassium pump is an integral membrane protein that binds to and transport sodium and potassium ions from one side of the black of membrane to the other way.
00:15
Remember that normally i guess that the levels of sodium are higher in the extracellular than in the intracellular.
00:24
So you have higher amounts of sodium out of the cell than inside of the cell.
00:30
And the opposite happens with potassium.
00:33
Potassium levels are normally higher inside of the cell and lower outside of the cell.
00:42
So because of gradient, potassium should move from the inside to the outside and sodium from the outside to the inside.
00:51
But this sodium potassium atp pump is a type of active transport.
00:55
It means it is going to move sodium and potassium up the concentration gradient.
01:00
It means from lower concentrations to higher concentrations.
01:02
So in this case, sodium is going to be moved out of the cell, specifically three sodium ions in exchange by two potassium ions inside of the cell.
01:14
So let's answer this question...