2. Membrane Potentials Flashcards
1
Q
Give 5 functions of a membrane
A
- Structural barrier
- Prevents free passage
- Fluidity
- Communication
- Respond to external stimuli
2
Q
What is the resting membrane potential of a neuron?
A
-70mV
3
Q
What is the concentration of K+ in the ECF and ICF?
A
ECF: 5
ICF: 150
4
Q
What is the concentration of Na+ in the ECF and ICF?
A
ECF: 150
ICF: 15
5
Q
What are the concentrations of protein anions in the ECF and ICF?
A
ECF: 0
ICF: 65
6
Q
What is a membrane potential?
A
Separation of opposite charges
7
Q
What is the Nernst equation?
A
E=61x log Co/Ci
