2.15 understand the factors that affect the rate of movement of substances into and out of cells, to include the effects of surface area to volume ratio, temperature and concentration gradient

  • High surface area to volume ratio – increased rate of diffusion/osmosis due to the molecules having more space to diffuse into
  • Low surface to volume ratio – decreased rate of diffusion/osmosis as there is less space for the molecules to diffuse into
  • Higher temperature increases the rate of kinetic energy of the particles, so diffusion occurs quicker
  • The steeper the concentration gradient (the greater the difference in concentration between 2 regions) the faster the rate of osmosis
  • The shallower the concentration gradient, the slower the rate of osmosis

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s