CLASE 2 DIFUCION FACILITADA Y ESTADO ESTACIONARIO POTENCIAL DE NERNST (BMC PARALELO 2026 )

membrane and we saw diffusion through the membrane and we saw that diffusion as simple diffusion which is a type of passive diffusion. Does anyone remember what other type of passive diffusion we saw or named? The simple and the active one could be, right? Which is also passive. Ah, so you can come in through the

doors if I let you, right? Well, it's called facilitated when we require someone to facilitate our entry through the membrane. Unlike simple diffusion, this requires a protein. So, when we talk about simple diffusion, Ulisc, selectivity, where was it? In two fundamental things that I told them happened to those molecules. What was a characteristic of the

molecules? Non-ionic. Non-ionic, that is, it could not have a charge. and the other one was small, very small. That was the condition, the selectivity of the membrane. Now, not all molecules that cross the biological membrane have selectivity only by size or charge. This is precisely where we come in when we talk about facilitated diffusion

to a transport mechanism. Obviously passive, that is, remember that passive meant that it does not require energy expenditure; diffusion extercism provides me with the energy that defined the process as spontaneous. When a spontaneous process occurred, what was the outcome ? But come out, you saw it, to save you, you're here. Negative. Negative. There it is. The delaj was

negative. So the process releases energy when it occurs. Because? because it tended towards equilibrium. There it is. In the case of passive transport, ah also tends towards equilibrium and is obviously in favor of the gradient. In other words, with respect to that it has the same characteristic as simple diffusion. What's the big difference? The big