Main distinction – helped with Diffusion vs energetic Transport

Facilitated diffusion and active transport are two methods associated in the transport of molecules throughout the cabinet membrane. The plasma membrane the a cell is selectively permeable to the molecules which move throughout it. Therefore, ions, also as tiny and huge polar molecules, cannot pass through the plasma membrane by simple diffusion. The motion of ions and also other polar molecules is facilitated by transmembrane proteins in the plasma membrane. In both helped with diffusion and energetic transport, transmembrane proteins are affiliated in the passage of molecules throughout the plasma membrane. The main difference in between facilitated diffusion and energetic transport is the facilitated diffusion occurs v a concentration gradient whereas energetic transport occurs versus the concentration gradient by using energy from ATP.

You are watching: Similarities between active transport and facilitated diffusion

Key areas Covered

1. What is promoted Diffusion – Definition, Mechanism, Function 2. What is energetic Transport – Definition, Mechanism, Function 3. What space the Similarities in between Facilitated Diffusion and active Transport – synopsis of common Features 4. What is the Difference between Facilitated Diffusion and energetic Transport – compare of an essential Differences

Key Terms: Antiporters, transport Proteins, Channel Proteins, Concentration Gradient, assisted in Diffusion, Plasma Membrane, Primary energetic Transport, secondary Active Transport, Symporters, Transmembrane Proteins, Uniporters


What is assisted in Diffusion

Facilitated diffusion is a membrane transport technique by which molecule move throughout the plasma membrane through the concentration gradient through the aid of transmembrane proteins. Since the carry of molecule occurs v the concentration gradient, promoted diffusion walk not usage cellular power for the transport of molecules. Generally, ions and also other hydrophilic molecules room repelled from the plasma membrane as result of the hydrophobic nature the the lipid molecule in the plasma membrane. Hence, transmembrane proteins the are associated in the promoted diffusion shield the polar and huge molecules indigenous the repulsive forces of the membrane lipids. Two species of transmembrane protein mediate promoted diffusion. They space carrier proteins and channel proteins.


Figure 1: assisted in Diffusion

Carrier proteins tie to the molecule to it is in transported and undergo conformational transforms in the protein, translocating the molecules throughout the plasma membrane. Channel proteins comprise a sharp via which the molecules have the right to be transported. Part channel proteins are gated and also can be regulated in response to specific stimuli. Channel proteins transport molecules much faster than carrier proteins and are only offered in the facilitated diffusion. Both transport proteins and also channel proteins, i beg your pardon mediate the promoted diffusion, room uniporters. Uniporters just transport a particular form of molecule in a details direction. Examples of transmembrane proteins the are associated in assisted in diffusion room glucose transporters, amino mountain transporters, urea transporters etc. 

What is energetic Transport

Active transport describes the transport of molecules across the plasma membrane versus the concentration gradient by using energy. Transmembrane transport proteins are connected in energetic transport. Two types of energetic transports have the right to be figured out in a cell. They room primary energetic transport and second active transport. Primary energetic transport straight uses the metabolic power in the type of ATP to transfer molecules throughout the membrane. The carrier proteins that carry molecules through primary energetic transport are always coupled through ATPase. The most usual example of primary active transport is the sodium-potassium pump. That moves 3 Na+ ions right into the cabinet while moving two K+ ion out that the cell. Sodium-potassium pump helps in maintaining the cabinet potential. The sodium-potassium pump is shown in figure 2.


Figure 2: Sodium-Potassium Pump

The second active transport depends on the electrochemical gradient that the ions in either next of the plasma membrane to carry molecules. That method secondary energetic transport offers the energy released by delivering one form of molecules through its concentration gradient to carry another kind of molecule against the concentration gradient. Therefore, transmembrane proteins affiliated in the second active move are called cotransporters. The two varieties of cotransporters space symporters and antiporters. Symporters transport both molecules in the same direction. Sodium-glucose cotransporter is a kind of symporter. Antiporters transport the two species of molecule to the contrary directions. The sodium-calcium exchanger is an instance of antiporter.

Similarities between Facilitated Diffusion and active Transport

Facilitated diffusion and active transport are two membrane transport mechanisms, which deliver molecules across the plasma membrane.Transmembrane proteins are connected in both assisted in diffusion and energetic transport.

Difference between Facilitated Diffusion and active Transport


Facilitated Diffusion: Facilitated diffusion is the deliver of molecules throughout the plasma membrane from higher concentration come a reduced concentration by means of transmembrane proteins.

Active Transport: Active transport is the move of molecules throughout the plasma membrane from short concentration to a higher concentration by method of transmembrane proteins, utilizing ATP energy.

Concentration Gradient

Facilitated Diffusion: Facilitated diffusion occurs with the concentration gradient.

Active Transport: Active transfer occurs versus the concentration gradient.


Facilitated Diffusion: Facilitated diffusion does no require energy to move molecules.

Active Transport: Active move requires energy to transport molecules throughout the membrane.


Facilitated Diffusion: Sodium channels, GLUT transporters, and amino acid transporters room the examples of helped with diffusion.

Active Transport: Na+/K+ ATPase transporters, Na+/Ca2+ cotransporter, and sodium-glucose cotransporter room the instances of active transport.

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Facilitated diffusion and active transport are two membrane deliver mechanisms affiliated in the i of molecules across the plasma membrane. Both facilitated diffusion and energetic transport use transmembrane protein to transport molecules. Helped with diffusion go not call for cellular power to deliver molecules. However, energetic transport uses ATP or electrochemical potential to deliver molecules. Therefore, the main difference between facilitated diffusion and active transport is the usage of energy for the transportation by each method. 


1.“ promoted transport – Boundless open up Textbook.” Boundless, 26 may 2016, obtainable here. Accessed 7 Sept. 2017. 2. “Active Transport.” energetic Transport | biologic I, courses. Available here. Accessed 7 Sept. 2017.

Image Courtesy:

1. “Blausen 0394 promoted Diffusion” by “Medical collection of Blausen clinical 2014”. WikiJournal of medicine 1 (2). DOI:10.15347/wjm/2014.010. ISSN 2002-4436. – Own job-related (CC by 3.0) via Commons Wikimedia2. “OSC Microbio 03 03 Transport” by CNX OpenStax – (CC by 4.0) via Commons Wikimedia