DIFFUSION
TRUE or FALSE: Facilitated diffusion requires the use of energy.
FALSE. Facilitated diffusion is a type of passive transport (requires NO ENERGY).
TRUE or FALSE: Active transport requires the use of ENERGY
True
TRUE or FALSE: Osmosis requires the use of ENERGY
False
In DIFFUSION molecules move from _______ concentration to _______ concentration.
HIGH concentration --> LOW concentration
What kind of energy does active transport require?
ATP (adenosine triphosphate)
Osmosis is a type of ________________ transport
passive
What is a selectively permeable membrane?
A membrane that allows some molecules and other particles to enter and exit while blocking others
List one factor that determines if a molecule will diffuse through a membrane.
1. Size
2. Charge
3. Concentration
4. Temperature
Active transport is the movement of molecules from an area of ______ concentration to an area of _______ concentration.
Active transport =
Low concentration --> High concentration
In osmosis water molecules move from ___________ concentrations to ____________ concentrations.
HIGH concentration --> LOW concentration
List TWO differences between active transport and diffusion.
1. Diffusion is the movement of molecules from an area of HIGH concentration to an area of LOW concentration. While Active Transport is the movement of molecules from an area of LOW concentration to an area of HIGH concentration.
2. Diffusion DOES NOT require energy while Active Transport DOES requires energy
An animal cell surrounded by fresh water will burst because the OSMOTIC PRESSURE causes
WATER to move INTO THE CELL.