Facilitated diffusion (also known as facilitated transport or passive-mediated transport) is the process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane via specific transmembrane integral proteins

1. FACILITATED DIFFUSION

5. FACTORS AFFECTING FACILITATED DIFFUSION
TEMPERATURE CONCENTRATION DIFFUSION
DISTANCE
SIZE OF THE
MOLECULES

6. FEATURES OF FACILITATED DIFFUSION
Across plasma membrane
Along concentration
gradient
Passive Trasport
Occur through
transmembrane proteins

7. TRANSMEMBRANE
PROTEINS
1. CARRIER PROTEINS
• a) Uniport (non-coupled)
• b) Symport (coupled)
• c) Antiport (coupled)
2. CHANNEL PROTEINS
• A. Gated channel
• B. Non-gated channel

9. FEATURES OF
TRANSMEMBRANE
PROTEINS
Made of
proteins
Selective
Saturation inhibition

10. TYPES OF TRASPORT
SYSTEMS
1. UNIPORT
2. COTRASPORT

11. FACILITATED TRASPORT OF GLUCOSE

12. Reference:
plant physiology by Taiz and Zeiger
Ncert 11 textbook
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Abeer Ali
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