BIOELECTRICITY Flashcards
1
Q
HOW DO YOU MEASURE THE MEMBRANE POTENTIAL
A
MUCH LIKE THE PATCH CLAMP TECHNIQUE A GLASS ELECTRODE IS USED EXCEPT THE PIPETTE IS A LOT SMALLER
2
Q
WHAT IS THE RESTING CELL MEMBRANE POTENTIAL USUALLY
A
APPROX -70MV
3
Q
HOW MUCH OF THE RESTING MEMBRANE POTENTIAL IS AS A RESULT OF THE NA/K ATPASE
A
APROX 20%
4
Q
WHAT IS THE EC CONCENTRATION OF ANIONS
A
0MM
5
Q
WHAT IS THE IC CONCENTRATION OF ANIONS
A
65MM
6
Q
WHAT IS THE NERNST EQUATION
A
EION=RT/ZF * LN[ION}IN/[ION]OUT
R= GAS CONSTANT
T= TEMP (K)
Z=ION VALENCE
F=FARADAYS CONSTANT
7
Q
WHAT IS THE GOLDMANN EQUATION
A
VM= RT/ZF*LN PNA[NA]OUT+PK[K]OUT/PNA[NA]IN+PK[K]IN
WHERE P = RELATIVE PERMEABIITY
