Explain the term ‘concentration gradient’ in your own words.
How is the movement of particles in diffusion determined?
Give two examples other than the ones mentioned in class that involve diffusion. Explain the movement of the particles in each case.
Diffusion is an important process in respiration. How?
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Answers
Concentration gradient refers to the gradual change in the concentration of solutes in a solution as a function of distance through a solution. A solution, essentially, has two major components, the solvent (the dissolving component, e.g. water) and the solute (the particles that are dissolvable by the solvent).
In biochemistry, concentration pertains to the amount of a sub-component of a solution, e.g. the amount of solutes in a solution. Gradient, in turn, is a term that in general refers to the progressive increase or decrease of a variable with respect to distance. In this regard, a concentration gradient would be the outcome when the amounts of solutes between two solutions are different.
In biology, a concentration gradient results from the unequal distribution of particles, e.g. ions, between two solutions, i.e. the intracellular fluid (the solution inside the cell) and the extracellular fluid (the solution outside the cell). This imbalance of solutes between the two solutions drives solutes to move from a highly dense area to a lesser dense area. This movement is an attempt to establish equilibrium and to eliminate the imbalance of solute concentrations between the two solutions.
Explanation:
Explain the term ‘concentration gradient’ in your own words.
A concentration gradient occurs when a solute is more concentrated in one area than another. A concentration gradient is alleviated through diffusion, though membranes can hinder diffusion and maintain a concentration gradient. “Concentration” refers to how much of a solute is in a given amount of solvent.
How is the movement of particles in diffusion determined?
Diffusion is the movement of particles move from an area of high concentration to an area of low concentration until equilibrium is reached. ... The rate of this movement is a function of temperature, viscosity of the fluid and the size (mass) of the particles.
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