They have a rich blood supply to keep a concentration gradient.

According to the theory, sometimes water is absorbed against concentration gradient.

A concentration gradient is established between the root and the soil water.

Diffusion is the movement of molecules due to a concentration gradient.

These are absorbed by the root hairs against a concentration gradient.

This concentration gradient is created by molecules which cannot pass through the membrane.

Again a vertical stable salt concentration gradient is set up, and a heat source introduced.

Building a concentration gradient of non-volatile components at the surface is another.

The most commonly used driving forces of a membrane process in industry are pressure and concentration gradients.

Due to a concentration gradient of the ions, mass transport must take place.

This morphogen concentration gradient can thus be used to determine the position of the cells.

It is a matter of simple diffusion doing work by dissipating the concentration gradient.

There are concentration gradients in such areas that affect particles motion strongly.

These forms of transport require energy, as the products being transported are usually moving against a higher concentration gradient.

This approach seeks to maximise the concentration gradient providing there are no symptoms.

Water passively follows the sodium out of the cell along its concentration gradient.

The rate of transport is governed by the diffusivity and the concentration gradient.

The water moves down a concentration gradient from the soil solution to the xylem.

But in order for this process to occur, a concentration gradient of potassium ions must first be set up.

It spreads from a localized source and forms a concentration gradient across a developing tissue.

These forces pull the neurotransmitter substrate into the cell, even against its own concentration gradient.

In contrast, uniporters transport a single ion down its concentration gradient.

This allows direct cytoplasm-to-cytoplasm flow of water and other nutrients along concentration gradients.

The membrane potential depends upon the maintenance of ionic concentration gradients across it.

Gases may diffuse in either direction depending on the concentration gradient between the two layers.