Cell transport mechanisms

i Know the structure of the cell surface membrane with reference to the fluid mosaic model.

ii Understand how passive transport is brought about by:

• diffusion

• facilitated diffusion (through carrier proteins and protein channels)

• osmosis.

iii Understand how the properties of molecules affects how they are transported, including solubility, size and charge.

iv Know that large molecules can be transported into and out of cells through the formation of vesicles, in the processes of endocytosis and exocytosis.

CORE PRACTICAL 5: Investigate the effect of temperature on beetroot membrane permeability.

CORE PRACTICAL 6: Determine the water potential of plant cells.

$$\text{Water potential}=\text{turgor pressure}+\text{osmotic potential}$$