Cell Transport Flashcards
Three types of passive transport
Osmosis
Diffusion
Facilitated diffusion
Passive transport
Cell uses no energy
Molecules move randomly from high to low concentration
Diffusion
Random movement of particles from area of high to low concentration
Will continue to move until equilibrium is reached
Diffusion is only for
Small non charged particles eg oxygen
Osmosis
Diffusion of water
Isotonic
Concentration inside the cell is the same as outside the cell
Water moves equally in and out of the cell
Hypotonic solution
Concentration of solute inside the cell is greater than the concentration outside of the cell
Water moves from outside to inside the cell
Hypertonic
Solute inside the cell is less than the solute outside the cell
Water moves out of the cell
Facilitated diffusion
Carrier protein carries larger molecules across the cell ex. glucose
Active transportation is the opposite of
Passive transportation
Active transportation
Requires Energy (ATP)
Often uses carrier proteins
Moves molecules specifically (either with the gradient or against the gradient)
Examples of active transportation
Protein pump, Exocytosis, Endocytosis (pinocytosis/phagocytosis/recepetor-assisted endocytosis)
Endocytosis
Moves large molecules into the cell
Exocytosis
Moves large molecules out of the cell
3 types of endocytosis
Pinocytosis (cell drinking)
Phagocytosis (cell eating)
Receptor-assisted endocytosis (triggers endocytosis using protein receptors)
