concentration gradient
Density difference slope
A concentration gradient is the difference in concentration of a substance between two regions, typically across a membrane or through a solution.
Molecules naturally move down their concentration gradient—from areas of higher to lower concentration—through diffusion.
Oxygen crosses the lung membrane along its concentration gradient.
The term is fundamental in biology and chemistry for understanding how substances move without energy expenditure.
- chemotaxisMovement toward chemical cues
- molaritySolute amount per volume
- diffusionPassive molecular spreading
- osmosisSolvent crossing semipermeable barrier
- cell membraneOuter layer of cytoplasm
permeability · blood brain barrier · partial pressure · dynamic equilibrium · waste removal · oxygen delivery · evaporation · convection · tonicity · sedimentation · gas exchange · boundary conditions · effusion · dialysis · differential equations · effusion
- gradientsfade, blend, smooth transition, color fade, ombre
- Bacterial behaviorchemical signals, gene regulation, population density, collective behavior, pheromones
- Biological Transportdiffusion, osmosis, carrier proteins, endocytosis, exocytosis
- membrane transportsodium channel, chloride channel, diffusion, osmosis, ionophore
- Osmoregulationosmoregulation, osmosis, osmotic pressure, water balance, electrolyte balance
- osmosisosmosis, osmotic pressure, semipermeable membrane, semipermeable, osmometer
concentration, gradient, concentrate, concentrated, concentrating, concentrates, concentrator, concentric, center