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21 Cards in this Set

  • Front
  • Back
simple diffusion is driven by what kind of energy
what kind of substances move by simple diffusion
fats, oxygen, carbon dioxide
how do substances move into a cell by facilitated diffusion
by carrier protein or or a membrane channel
How does water move into the cell
by osmosis or aquaporins or filtration
what kinds of substances move into the cell through facilitated diffusion
ions, glucose
how many kinds of active transport are there
three, primary active transport, and secondary active transport, and vesicular transport
what are the four types of passive processes
filtration, simple diffusion, faciliated diffusion, osmosis
what kinds of things will just diffuse into the cell
if its lipid soluble, small enough, or can be assisted by a carrier molecule
what kinds of things are carried with facilitated diffusion
glucose, sugars, amino acids, and ions
can channels transport ions
yes, and water too
substances that are transported by facilitated diffusion are going against concentration gradient
false, moving along it
the cell's tendency to resist further net water entry
osmotic pressure
diffusion of a solvent through a selectively permeable membrane
In the sodium potassium pump, are both ions moved by their concentration gradient
yes, Na and K are both moved against
what concentration is higher in the cell that of potassium or that of sodium
in what kinds of cells are you likely to find alot of sodium and potassium pumps
muscle and nerve cells
what happens with the sodium potassium pump
potassium leaks out naturally and sodium leaks in naturally, so the body tries to get potassium back in and sodium back out with the pump
explain secondary active transport
well its like you are indirectly driving other stuff to come into the cell against its concentration gradient (water going down a hill to power a generator)
why use vesicular transport
to transport large things like fluids, macro molecules, and large particles into and out of the cell, moving stuff within the cells (vesicular trafficking)
vesicular transport uses what form of energy
what kind of functions is exocytosis useful for
mucous secretion, hormone secretion, ejection of wastes