Card Set Information
movement of molecules against the concentration gradient. moving from low to high concentration.
*needs energy (ATP)*
no energy required
fluid in the cell
fluid outside of the cell
fluid within tissues
semi permeable membrane
somethings can get in and out of the cell.
*** All mammal cells are semi-permeable ***
nothing can get into and out of the cell
anthing and everything can get in and out of the cell.
*** Truly doesnt exist ***
movement of molecules moving from a higher concentration to a lower concentration.
EX- making ice-tea, the powder is the solute and the water is solvent.
Facilated diffusion (passive)
molecules that can diffuse through the cell but not quickly and requires a carrier protein to assist.
*still moves from a high to low concentration*
the solvent moves instead of the solute, passive movement of water through a semi-permeable membrane from a dilute solution to a more concentrated one
* want to have equal concentrations in and out of the cell*
have equal concentrations of solute both in and outside of the cell.
the cell will strink because the concentration of solutes are higher outside of the cell.
* crenation- cell strinks*
the cell will swell because the concentration of solute is higher inside the cell.
* the cell can lyse (explode)*
Endocytosis (two types)
phagocytosis- "cell eating" eating whole molecules
Pinocytosis- " cell drinking" ingestion of liquid particles
moving particles outside of the cell
* excretion of waste products*
*mast cells- secrete histamine
low concentration of sodium inside the cell.
high concentration of potassium inside the cell.
three sodium ions are exchanged for every two potassium.