GENERAL HISTOLOGY

Detailed explanation-1: -High concentration means the density of the material is greater than what surrounds it. This is in contrast to a lower concentration where the density of material would be less. This is helpful in explaining the natural motion of materials because they naturally move from high concentration to lower.

Detailed explanation-2: -The difference in the concentration of a substance between two areas is called the concentration gradient . The bigger the difference, the steeper the concentration gradient and the faster the molecules of a substance will diffuse. The direction of diffusion is said to be ‘down’ or ‘with’ the concentration gradient.

Detailed explanation-3: -Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration. For cell transport, diffusion is the movement of small molecules across the cell membrane.

Detailed explanation-4: -The greater the difference in concentration, the quicker the rate of diffusion. The higher the temperature, the more kinetic energy the particles will have, so they will move and mix more quickly. The greater the surface area, the faster the rate of diffusion.