What is Facilitated Diffusion?
Facilitated Diffusion Definition: Facilitated diffusion is a phenomenon in which diffusion occurs through a surface barrier (e.g., a wall or floor) under various conditions.
Facilitated diffusion is a passive transport mechanism in cells that enables the movement of molecules across the cell membrane. Unlike simple diffusion, facilitated diffusion relies on specialized proteins embedded in the membrane called transport proteins. These proteins create channels or carriers through which specific molecules, such as polar or charged substances, can move.
Also read: Active Transport
In facilitated diffusion, molecules move along their concentration gradient, i.e., they move from an area of high concentration to an area of low concentration. However, unlike active transport, facilitated diffusion does not require the expenditure of energy from the cell.
This process is crucial for the uptake of essential molecules like glucose, ions, and amino acids into cells. For instance, glucose transporters facilitate the movement of glucose into cells where it can be utilized for energy production (ATP) or stored for later use. Facilitated diffusion ensures the maintenance of cellular homeostasis by allowing necessary molecules to enter and leave cells as needed.
Also Read: Glycolysis
Facilitated Diffusion:: Understanding the Process
Facilitated diffusion is an important biological process whereby molecules move across cell membranes with the help of transport proteins. Unlike simple diffusion, facilitated diffusion allows polar and charged molecules to traverse the membrane efficiently. Through specific protein channels or carriers, substances such as glucose, ions, and amino acids can passively move down their concentration gradients, ensuring essential nutrients enter cells while maintaining cellular equilibrium.
Table of Content
- What is Facilitated Diffusion?
- Facilitated Diffusion Diagram
- Factors Affecting Facilitated Diffusion
- Transmembrane Proteins
- Examples of Facilitated Diffusion
- Facilitated Diffusion VS Diffusion VS Active Transport
- Conclusion: Facilitated Diffusion
- FAQs – Facilitated Diffusion