Membrane Potential

Question 1

What is Nerst Potential?

Answer 1

equation

Question 2

Chemical Driving Force

Answer 2

Based upon Concentration, pushes toward equilibrium

Question 3

Electrical Driving force

Answer 3

based on charge and secondarily based on membrane potential

Question 4

Electrical and Chemical driving forces work at the same time

Answer 4

yes

Question 5

As my V sub M gets more positive the more Na+ leaves the cell

Question 6

E sub K

Answer 6

individual electrical driving force

Question 7

V sub m

Answer 7

overall electrical driving force

Question 8

E sub K = RT/Fz In( [K+]sub B / [K+] sub A )

Question 9

E sub K = 62 log ( [K+]sub B / [K+] sub A )

Question 10

In cells the reference side is always the inside of the cell

Answer 10

true

Question 11

when the chemical and electrical driving force are equal its an equilibrium

Answer 11

True, the sodium potassium pump helps maintain it

Question 13

what is a linked channel

Answer 13

also a diffusion channel, they are open for business

Question 14

Do linked channels have selectivity?

Answer 14

Yes, specific ions

Question 15

The total membrane potential is

Answer 15

a composite of the individual Nerst potential for permeable ions

Question 16

the more permeable ion you have the ____ that ion contributes to the total membrane potential

Answer 16

more

Question 17

does Na+ or K+ contribute more

Answer 17

Na+ -94 vs K+ -60

Question 18

what is g

Answer 18

permeability

Question 19

what is E?

Question 20

what is the GHK equation

Answer 20

Vsubm = (Esubk)(gsubk) + (EsubNa)(gsubNa) / gsubk + gsubNa