Diffusion is defined as the net movement of molecules from a region of their higher concentration to a region of their lower concentration down a concentration gradient until equilibrium is reached.
Factors affecting rate of diffusion are:
- temperture- with increasing temperature, molecules gain more kinetic energy and hence they move faster. Therefore the rate of diffusion increases.
- size/mass of molecules- the smaller the molecules, the faster is the rate of diffusion.
- surface area- with increasing surface area, the rate of diffusion increases.
- concentration gradient- the higher the concentration, the faster is the rate of diffusion.
Importance of diffusion to living organisms are:
- gaseous exchange across…