00:01
This question involves the process of active transport.
00:04
Let's imagine this is our cell, okay, and this is our sodium, potassium, atpas, that is a a type of transport of the type of active transport, of primary active transport.
00:22
You know that the concentrations of sodium are higher in the extracellular than in the intracellular.
00:30
Intracellular and the concentration of potassium is higher in the intracellular and it is lower in the extracellular.
00:41
So it is called primary active transport.
00:45
First, it is called active transport because it moves substances up in the concentration gradient.
00:52
It means from a compartment with low amounts of the substance to a compartment with high amount of the substance.
01:01
In case of sodium, it's going to move sodium from the intracellular to extracellular.
01:07
In case of potassium, it's going to move from extracellular to the intracellular.
01:13
Okay.
01:14
As this process is moving substances up the concentration gradient, then it is going to use directly atp.
01:24
Okay, so atp is used directly by the same, by the same sodium potassium atp spam.
01:32
So this is why it is called primary active transport.
01:36
Now here let's have another pump, another pump, okay? and we're going to talk about secondary active transport...