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What is the difference between facilitated diffusion and simple diffusion in terms of the mechanisms by which molecules move across a cell membrane?

Flavio Balistreri ∙

Lvl 10

∙ 1mo ago

Updated: 2/6/2025

Facilitated diffusion involves the movement of molecules across a cell membrane with the help of specific proteins, while simple diffusion does not require any proteins and relies on the molecules moving freely through the membrane.

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Q: What is the difference between facilitated diffusion and simple diffusion in terms of the mechanisms by which molecules move across a cell membrane?

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Can polar molecules cross the lipid bilayer?

Yes, polar molecules can cross the lipid bilayer through facilitated diffusion or active transport mechanisms.

How does passive diffusion differ from facilitated diffusion in terms of their mechanisms of transport?

Passive diffusion and facilitated diffusion both involve the movement of molecules across a cell membrane, but they differ in their mechanisms of transport. Passive diffusion does not require the assistance of transport proteins and relies on the natural movement of molecules from an area of high concentration to an area of low concentration. Facilitated diffusion, on the other hand, involves the use of specific transport proteins to help molecules move across the membrane, typically from an area of high concentration to an area of low concentration. In summary, passive diffusion is a simple process driven by concentration gradients, while facilitated diffusion involves the assistance of transport proteins for more efficient movement of molecules.

What are the similarities between facilitated diffusion and active transport in terms of their mechanisms of transporting molecules across the cell membrane?

Facilitated diffusion and active transport are both methods of transporting molecules across the cell membrane. They both involve the use of specific carrier proteins to facilitate the movement of molecules. However, the key difference is that facilitated diffusion does not require energy input from the cell, while active transport does require energy in the form of ATP to move molecules against their concentration gradient.

What are the similarities between active transport and facilitated diffusion in terms of their mechanisms of transporting molecules across the cell membrane?

Both active transport and facilitated diffusion are mechanisms that transport molecules across the cell membrane. They both involve the movement of molecules from an area of higher concentration to an area of lower concentration. However, active transport requires energy input from the cell to move molecules against their concentration gradient, while facilitated diffusion does not require energy and relies on carrier proteins to help molecules pass through the membrane.

What does not require energy from the cell?

Diffusion, osmosis, and facilitated diffusion do not require energy from the cell as they rely on passive transport mechanisms to move molecules across the cell membrane.

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Related Questions

What is the difference between diffusion and facilitate diffusion?

The difference between diffusion and facilitated diffusion is that facilitated diffusion is that the molecules pass through special protein channels.

What is a protein moves molecules across a membrane?

Facilitated diffusion moves molecules through cell membranes passively.

How does passive diffusion differ from facilitated diffusion in terms of their mechanisms of transport?

Passive diffusion and facilitated diffusion both involve the movement of molecules across a cell membrane, but they differ in their mechanisms of transport. Passive diffusion does not require the assistance of transport proteins and relies on the natural movement of molecules from an area of high concentration to an area of low concentration. Facilitated diffusion, on the other hand, involves the use of specific transport proteins to help molecules move across the membrane, typically from an area of high concentration to an area of low concentration. In summary, passive diffusion is a simple process driven by concentration gradients, while facilitated diffusion involves the assistance of transport proteins for more efficient movement of molecules.

Can polar molecules cross the lipid bilayer?

Yes, polar molecules can cross the lipid bilayer through facilitated diffusion or active transport mechanisms.

What are the similarities between facilitated diffusion and active transport in terms of their mechanisms of transporting molecules across the cell membrane?

Facilitated diffusion and active transport are both methods of transporting molecules across the cell membrane. They both involve the use of specific carrier proteins to facilitate the movement of molecules. However, the key difference is that facilitated diffusion does not require energy input from the cell, while active transport does require energy in the form of ATP to move molecules against their concentration gradient.

What are the similarities between active transport and facilitated diffusion in terms of their mechanisms of transporting molecules across the cell membrane?

Both active transport and facilitated diffusion are mechanisms that transport molecules across the cell membrane. They both involve the movement of molecules from an area of higher concentration to an area of lower concentration. However, active transport requires energy input from the cell to move molecules against their concentration gradient, while facilitated diffusion does not require energy and relies on carrier proteins to help molecules pass through the membrane.

What does not require energy from the cell?

Diffusion, osmosis, and facilitated diffusion do not require energy from the cell as they rely on passive transport mechanisms to move molecules across the cell membrane.

How does facilitated diffusion contrast with active transport in terms of their mechanisms of transporting molecules across the cell membrane?

Facilitated diffusion and active transport are both ways that molecules can move across the cell membrane, but they differ in their mechanisms. Facilitated diffusion uses protein channels or carriers to help molecules move from an area of high concentration to low concentration without requiring energy. Active transport, on the other hand, uses energy to move molecules against their concentration gradient, often with the help of protein pumps.

Is this true that Facilitated diffusion would be used on large molecules?

its false, facilitated diffusion would be used on small molecules

How are facilitated diffusion and active transport different in terms of their mechanisms of transporting molecules across the cell membrane?

Facilitated diffusion uses transport proteins to move molecules across the cell membrane with the concentration gradient, while active transport requires energy to move molecules against the concentration gradient.

Diffusion with a channel protein?

Channel proteins facilitate the passive movement of molecules down their concentration gradient. They form channels across the cell membrane, allowing specific molecules to move in and out of the cell without requiring energy input. This process is known as facilitated diffusion.

How does Facilitated diffusion differs from diffusion in that facilitated diffusion?

Facilitated diffusion involves the use of carrier proteins to move specific molecules across the cell membrane, while simple diffusion does not require proteins and involves the movement of molecules from an area of high concentration to low concentration. Facilitated diffusion is selective and allows for faster transport of specific molecules that may be too large or polar to diffuse freely through the membrane.

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