osmosis Flashcards
osmosis def
the diffusion of water across a semi-permeable membrane to dilute higher solute concentrations
hypertonic def
higher % solute, lower % water
hypotonic def
lower % solute, higher % water
isotonic def
equal % solute, equal % water
active transport def
the movement of molecules against the concentration gradient (by using energy/ATP)
exocytosis def
when a cell moves large molecules out of a cell using vesicles
endocytosis def
when a cell moves large molecules into a cell using vesicles
Comparing and contrasting different types of transport in term of what type of particles they move, whether they go down or against the concentration gradient, whether they require transport proteins, whether they require energy
All- all transport some type of molecule through the cell membrane
simple diffusion- from high to low, small and nonpolar molecules, no energy
facilitated diffusion- from high to low, large or polar molecules, no energy
active transport- from low to high, sugars and ions, uses energy
Predict which way solutes will diffuse across a membrane
solutes have to diffuse by active transport. They always go from an area with high concentration to low concentration
Predict which way water will diffuse across a membrane via osmosis
Water will diffuse towards the solution with the most solutes until an equilibrium is reached.
True or False:
if an egg is surrounded by a hypertonic solution, it will expand
false; the water will be moving out of the egg so it will shrink
True or False:
isotonic is the preferred condition for animals
true
