And when you have this situation where you have a higher concentration and then a lower concentration, we call this a concentration gradient. It is broken down into many fields, reflecting the complexity of life from the atoms and molecules of biochemistry to the interactions of millions of organisms in ecology. This biology dictionary is here to help you learn about all sorts of biology terms, principles, and life forms. These proteins use ATP hydrolysis to pump materials against their concentration gradients. A solution with a low solute concentration has a high water concentration, and a high water potential. Others can smell the scent because some of those molecules are always traveling away from the perfumed person, the source, out into the air—moving down the concentration gradient, from a high concentration to a lower concentration. Biology: Chapter 16 - Plant responses to abiotic stress (could add to) 3 Terms. Synonym(s): concentration gradient A concentration gradient occurs where the concentration of something changes over a certain distance. concentration gradient: a solution in which the concentration (density) of a solute increases in a continuous fashion from top to bottom, or end to end, of a container (for example, the centrifuge tube in density-gradient centrifugation). Decomposers: Microorganisms that break down waste products and dead matter. Concentration Gradient Definition Biology. Biology is brought to you with support from the. The concentration is changing from high to low and so we call this a concentration, concentration... concentration gradient. For example, a few drops of food dye in a glass of water diffuse along the concentration gradient, from where the dye exists in its highest concentration (for instance, the brightest blue or red) to where it occurs in its lowest concentration (the water is still clear). Gradient Definition noun, plural: gradients (1) A slope , which may be upward or downward. Definition: Concentration equilibrium. Cytoplasm: The water-based gel where the organelles of all living cells are suspended. concentration gradient in a sentence - Use "concentration gradient" in a sentence 1.  The diffusion of solvents, such as water, through a semipermeable membrane, is classified as osmosis. 2. (2) The degree of steepness or inclination, e.g., of a road or other geographic features. Biology is the study of living things. Pure water has the highest water potential. When there is no difference in concentration. Denatured Concentration gradient: The gradient between an area where a substance is at a high concentration and an area where it the substance is at a low concentration. For example, a few drops of food dye in a glass of water diffuse along the concentration gradient, from where the dye exists in its highest concentration (for instance, the brightest blue or red) to where it occurs in its lowest concentration (the water is still clear). The concentration of scent molecules is highest on areas of the skin that have had perfume or aftershave directly applied. They have a rich blood supply to keep a concentration gradient. A concentration gradient occurs where the concentration of something changes over a certain distance. In cell biology, a diffusion is a main form of transport for necessary materials such as amino acids within cells.