What is the difference between facilitated diffusion and secondary active transport

The sodium-potassium pump is shown in figure 2. Figure 2: Sodium-Potassium Pump. The secondary active transport relies on the electrochemical gradient of the ions in either side of the plasma membrane to transport molecules. That means secondary active transport uses the energy released by transporting one type of molecules through its concentration gradient to transport another type of molecule against the concentration gradient.

Therefore, transmembrane proteins involved in the secondary active transport are called cotransporters. The two types of cotransporters are symporters and antiporters.

Symporters transport both molecules in the same direction. Sodium-glucose cotransporter is a type of symporter. Antiporters transport the two types of molecules to opposite directions. The sodium-calcium exchanger is an example of antiporter. Facilitated Diffusion: Facilitated diffusion is the transport of molecules across the plasma membrane from higher concentration to a lower concentration by means of transmembrane proteins.

Active Transport: Active transport is the transport of molecules across the plasma membrane from low concentration to a higher concentration by means of transmembrane proteins, using ATP energy.

Facilitated Diffusion: Facilitated diffusion occurs through the concentration gradient. Active Transport: Active transport occurs against the concentration gradient.

Facilitated Diffusion: Facilitated diffusion does not require energy to transport molecules. Active Transport: Active transport requires energy to transport molecules across the membrane. Facilitated Diffusion: Sodium channels, GLUT transporters, and amino acid transporters are the examples of facilitated diffusion.

Facilitated diffusion and active transport are two membrane transport mechanisms involved in the passage of molecules across the plasma membrane.

How are diffusion and osmosis different? How is diffusion involved in osmosis? How is facilitated diffusion different from active transport? What are common mistakes students make with facilitated diffusion?

What are some examples of facilitated diffusion? What are some examples of diffusion? How is a concentration gradient related to the process of diffusion? See all questions in Diffusion. There are many types of transport processes in the membrane but I do not see the difference between two that are listed under completely different processes the active symport, and the passive cotransport. Yes I have read the articles, the problem is I have found listing stating Glut1 is a carrier protein, and also Glut1 is an active symport.

I tried to find a difference between the two processes and this furthered my confusion because I cannot find the difference. Add a comment. Active Oldest Votes. Background As commented upon by others, your question is not entirely clear and the best way to approach this question is by defining the various terminologies and physiological mechanisms used in your question: Active transport needs an energy source such as ATP.

Therefore your statement that [ Passive transport is mediated by diffusion , which typically occurs through a concentration gradient. Only small, relatively hydrophobic molecules are able to diffuse across a phospholipid bilayer at significant rates. Examples are gases such as O 2 and CO 2 in the lungs, and small polar but uncharged molecules such as H 2 O and ethanol Cooper, Facilitated diffusion is an example of passive diffusion , but aided by membrane-spanning channel proteins that span the lipid bilayer.

Therefore the particles molecules or ions do not have to dissolve in the cell membrane's hydrophobic lipid bilayer, allowing hydrophylic and larger molecules carbohydrates, ions to be transported into the cell. No external source of energy is needed and travel across the membrane in the direction determined by their concentration gradients and, in the case of charged molecules, by the electric potential across the membrane Cooper, Co-transport is active transport , where the energetically unfavorable transport of a particle against its electrochemical gradient is facilitated by the co-transport of a favorable one down its gradient.

In other words, multiple particles are transported so as to neutralize the sum of the transport. This is an example of a symporter. Improve this answer. Inhibitor Inhibitor 2 2 silver badges 8 8 bronze badges. Jerome Jerome 1. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.