Critical concentration gradient model is helpful in understanding the mechanism of Z-ring formation. The distribution of positive and negative regulators of Z-ring formation in cell is not random ...

A concentration gradient in the electrolyte is illustrated. ·If the electrolyte is unstirred, the gradiant causes H-ion diffusion to the surface, where they capture electrons (reduction) to become ...

Learn how molecules move through membranes by passive diffusion, active transport and osmosis. BBC Bitesize Scotland SQA National 5 Biology revision.

Diffusion Substances move from a high to a low concentration down a concentration gradient Carbon dioxide, oxygen, water, food substances, wastes, eg urea No Osmosis Water moves from a high to a ...

By using a low-viscosity silicone oil and fine-tuning the fabrication process, they've made the SlipChip more reliable for cell-based experiments and simpler for creating concentration gradients.