00:01
Okay, in order to answer this question, let's talk about the types of transport, okay? for example, we can have the passive transport that is going to move a substance down the concentration gradient and directly across a cell membrane.
00:13
Without the use of proteins, it's going to be called simple diffusion or simple transport, and also by the aid of some protein transporters.
00:24
And this is going to be called facilitated.
00:28
Okay, but it is going to be still a passive.
00:31
Movement, okay, because it is going to occur down the concentration grade.
00:34
For example, in simple diffusion, we're going to have oxygen, carbon dioxide, or water.
00:38
And in this case of facilitated diffusion, we're going to have glucose, for example.
00:44
Glucose is very big to move across a cell membrane by simple diffusion, and it is going to use transport like this.
00:50
Okay? then we have active transport that we're going to talk about, particularly think about active transport when they talk to you about pumps.
01:01
Okay, for example, the classic example is the sodium, potassium, atp, pump...