Wk 3 Flashcards
What is simple diffusion
molecule passes through phospholipid bilayer
What is facilitated diffusion channel
there is a channel in the phospholipid bilayer allowing the molecule to cross
What id Facilitated diffusion carrier
the molecule is attached to a carrier molecule to pass through the channel
What is the equilibrium potential
Electrical and chemical forces are equal
What is the difference in electrical charge between the inside and outside of the cell
-70mV
What 3 ions have a higher concentration gradient inside the cell
Na+, Ca2+, Cl-
What 2 ions have a higher concentration gradient outside the cell
K+ and OA-
What 3 ions have a higher electrical gradient inside the cell
Na+, Ca2+, K+ (all of the positively charged ones)
What 2 ions have a higher electrical gradient outside the cell
Cl-, OA- (all of the negatively charged ones)
Is the inside of the cell positive or negative
Negative
Where do positively charged ions want to travel
Inside the cell
Where do negatively charged ions want to travel
outside the cell
What ions have their own channel to pass through the membrane
Na+, K+, Ca2+, Cl-
What 2 ions have concentration and electrical gradients that oppose each other
K+ and Cl-
Where does Cl- and K+ start
inside the cell
How does Cl- leave the cell when its electrical and chemical gradients oppose each other
K+ symporter
What is a symporter
Where ion ‘A’ moves with its concentration gradient, creating energy for ion ‘B’ to travel against its concentration gradient
How does Ca2+ leave the cell
Na+ Ca2+ antiporter
What is an anti porter
Exchanges 2 different ions (allowing for some to leave and others to enter)
Na+ Ca2+ antiporter uses 3 Na+ into the cell, 1 Ca2+ out of the cell
In the sodium potassium pump, how many mol flow in and out of the cell
2 K+ move into the cell, 3 Na+ move out of the cell
What is the equilibrium potential
The point at where the concentration gradient (forcing K outside the cell) and the electrical gradient (forcing K inside the cell) is -70mV
