Facilitated diffusion

Facilitated diffusion is a type of passive transport that allows substances to cross cell membranes with the assistance of special transport proteins. This process is used by molecules that cannot diffuse rapidly through cell membranes, even when there is a concentration gradient across the membrane.

Overview

Facilitated diffusion is a type of passive transport that does not require the input of cellular energy. Instead, it relies on the concentration gradient created by each molecule. This means that molecules will move from an area of high concentration to an area of low concentration until equilibrium is reached.

Mechanism

The process of facilitated diffusion requires a specific transport protein. These proteins are embedded in the cell membrane and have a specific shape that allows only certain molecules to bind to them. When a molecule binds to the transport protein, it causes a change in the protein's shape, allowing the molecule to be transported across the membrane.

Types of Transport Proteins

There are two main types of transport proteins involved in facilitated diffusion: channel proteins and carrier proteins. Channel proteins form a pore in the cell membrane that allows molecules to pass through. Carrier proteins, on the other hand, bind to the molecule and change shape to carry the molecule across the membrane.

Role in the Body

Facilitated diffusion plays a crucial role in the body. It is responsible for the transport of necessary molecules such as glucose and amino acids across cell membranes. Without facilitated diffusion, cells would not be able to get the nutrients they need to function properly.

See Also

• Active transport
• Passive transport
• Cell membrane
• Transport protein
• Channel protein
• Carrier protein

Facilitated diffusion Resources
Need Help Finding a Doctor? Need help finding a doctor or specialist anywhere in the world? Explore our world directory. WikiMD's DocFinder can assist you in locating millions of physicians.	Medical Knowledge Access the latest research - Most recent articles Ongoing trials.

Translate to: East Asian 中文, 日本, 한국어, South Asian हिन्दी, Urdu, বাংলা, తెలుగు, தமிழ், ಕನ್ನಡ,
Southeast Asian Indonesian, Vietnamese, Thai, မြန်မာဘာသာ, European español, Deutsch, français, русский, português do Brasil, Italian, polski