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Cell membrane transport mechanisms - Coggle Diagram
Cell membrane transport mechanisms
Simple diffusion
Examples
Oxygen diffusion in the cornea
Water pass through the cell membrane
It doesn't use energy (ATP)
The molecules that use the simple diffusion are of hydrophobic and lipophilic nature
Small particles pass easier than larger particles
Particle distribution through the cell membrane
Involves particles passing between the phospholipids in the membrane
It can only happen if the phospholipid bilayer is permeable to the particles.
Facilitated diffusion
Examples
Ion transport
Amino acids transport
It doesn't use (ATP)
Free particle movement through specific channels
Cell control which types of channel are synthesized so they can control which substances diffuse in and out
The diameter and chemical properties of the channel ensure that only one type of particle passes through
Osmosis
Examples
Water molecules pass through a membrane
Absorbsion of water from the soil
It doesn't use energy (ATP)
Water diffusion through a membrane, according to a concentration gradient
Active Transport
Examples
E. coli vitamin B12 transport
Sodium-potassium pump
It uses energy (ATP)
Molecule movement mediated by membrane proteins
