Membrane and Action Potentials

Question 1

How a membrane potential measured?

Answer 1

• A membrane is placed outside the cell - Zero-volt level

- Another electrode is placed inside the cell and the voltage difference is measured

Question 2

What are the 5 phases of the action potential?

Answer 2

1. Resting membrane potential
2. Depolarising stimulus
3. Upstroke
4. Repolarisation
5. After-hyperpolarisation