Cell Transportation

Question 1

What does a semi-permeable cell membrane mean?

Answer 1

Semi-permeable means that only some molecules can diffuse across the lipid bilayer but other cannot.
The membrane only allows certain materials to pass through

Question 2

What are the five factors that determine if a molecule can enter a cell?

Answer 2

1) Solubility
2) Charge
3) Polarity
4) Size
5) Concentration

Question 3

How does size and polarity affect the permeability of a cell?

Answer 3

The lipid bilayer has a largely non-polar interior therefore, non-polar molecules are more permeable than polar molecules.

Question 4

What are the three sections of a cell?

Answer 4

1) Extracellular space— space outside of the cell that is occupied by fluids/liquids.
2) Cell membrane— separates the inner cell from the outer environment
3) Intracellular space— the space inside of a cell