Diffusion and Osmosis Flashcards
Definitions
What is Diffusion?
The net movement of particles down a concentration gradient, as a result of their random movement.
What is a concentration gradient?
An imaginary slope from a high concentration to a low concentration.
What is an applied example of diffusion in Hospitals?
Dialysis machines, filtering blood when kidneys fail.
What is a main factor that can affect rate of Diffusion?
Surface Area
What is the definition of Osmosis?
The diffusion of water molecules through a partially permeable membrane.
What is the definition of Osmosis in terms of water potential?
The net movement of water molecules from a region of high water potential (dilute solution) to a region of low water potential (concentrated solution) through a partially permeable membrane.
What happens if you put an animal cell in pure water?
It will take on too much water, swell and burst.
Why do plant cells not burst when in pure water?
Because of the Cell Wall.
