Diffusion, Osmosis & Active Transport Flashcards
What is diffusion?
The movement of particles from a high concentration to a low concentration.
In diffusion, how does temperature affect the rate of reaction?
The higher the temperature, the quicker the reaction will occur.
What is active transport?
The movement of molecules from an area of low concentration to an area of high concentration.
What does active transport require to occur? (Substance)
Specific proteins found in the cell membrane.
What do the particles in active transport have to go against?
The concentration gradient.
What is Osmosis?
The movement of water particles from an area of high water potential (water concentration) to an area of lower water potential (concentration).
What do the particles in Osmosis have to pass through?
A partially permeable membrane.
What does the partially permeable membrane do?
The semi-permeable membrane only lets some types of particles pass through. For example, water.
In terms of concentration, what way do the particles move in Diffusion?
From an area of high concentration to an area of low concentration.
In terms of concentration, what way do the particles move in Active transport?
From an area of low concentration to an area of high concentration.
In terms of concentration, what way do the particles move in Osmosis?
From an area of high concentration to an area of low concentration.
Does diffusion require energy?
No
Does active transport require energy?
Yes
Does osmosis require energy?
No
