Cellular Transport Flashcards
Cellular Transport
How materials get into and out of the cell
Cell membranes are ________
Selectively Permeable
Passive Transport Definition
A process that does not require energy to move
molecules from a HIGH to LOW concentration
Passive Transport Examples
Diffusion
Facilitated Diffusion
Osmosis
Diffusion
Movement of small particles across a
selectively permeable membrane like the cell membrane until equilibrium is reached. HIGH TO LOW CONCENTRATION
Osmosis
diffusion of water through a selectively
permeable membrane like the cell membrane, Water diffuses across a membrane from an area of HIGH concentration to and area of LOW concentration
Facilitated Diffusion
movement of larger molecules like glucose through the cell membrane larger molecules must be “helped”
Hypertonic Solutions
High concentration of solute.
Cell in HYPERTONIC solution, water diffuses out of cell. Causes cell to shrivel
Hypotonic Solutions
Low concentration of solute.
Cell in HYPOTONIC solution, water diffuses into cell.
Causes cell to swell.
Isotonic Solutions
Cell in ISOTONIC solution, water
diffuses in and out of cell at same rate. Equal
Active Transport
movement of molecules from LOW to HIGH
concentration. Energy is required as molecules must be pumped against the concentration gradient.