Exchanging Substances Flashcards
Diffusion, Active Transport, Osmosis, Hypertonic/Hypotonic,
Define Duffusion?
> Movement of particles from area of high concentration -> low concentration
Down a concentration gradient
Until equilibrium
What type of process is diffusion?
Passive process
No energy required
What factors affect rate of diffusion?
3
> Temperature
> Surface area
> Concentration Gradient
What happens to rate of diffusion when you increase temperature?
Increases -> particles move faster due to heat energy transferred to kinetic Energy
What happens to rate of diffusion when surface area increases?
Increase -> particles have to spread out further over a larger space
What happens to rate of diffusion when concentration gradient increases?
Increases -> More spreading of particles to other side to reach equilibrium
Define Osmosis?
Movement of water molecules from a dilute to a concentrated solution through a partially permeable membrane
What is a dilute solution?
Low concentration of solute (sugar)
High concentration of solvent (water)
HYPOTONIC SOLUTION
What is a concentrated solution?
High concentration of solute (sugar)
Low concentration of solvent (water)
HYPERTONIC
What is a dilute solution known as?
HYPOTONIC
What is a concentrated solution known as?
HYPERTONIC
What is an Isotonic solution?
Solution that has same salt concentration as cells and blood
Define Active Transport?
> Movement of substances from low concentration-> high concentration
Against a concentration gradient
What type of process is active process?
Energy requiring
Example of Active Transport in plant?
Root Hair Cell:
> Minerals from soil
