Diffusing/ osmosis/ transport/ surfaces

• diffusion is mvmnt of particles from

  high conc to low conc

  it is passive, and requires no energy

  no membrane needed
• Osmosis is the movement of

  water particles through a semi permeable membrane from high to low to balance the concentration of solution inside and outside a cell depending on which side is higher
• rate of diffusion of osmosis can be changed by

  increase of temperature

  increase of surface area

  increase of concentration
• Equation for osmosis

  percentage change in mas=

  final mass-initial mass/inital mass x100
• Active transport is what

  where carrier proteins use energy to move particles across a membrane , this can move this against a concentration gradient

  eg glucose and other mineral's