Q. Regarding the nerve fibre action potential, which statement is INCORRECT? (Solved)
1. does not involve calcium ions
2. after-depolarisation commences when repolarisation is 70% complete
3. total number of ions involved is minute compared to the total number present
4. spike potential peaks at sodium equilibrium potential
5. firing level (threshold) is at about -55mV
- d. spike potential peaks at sodium equilibrium potential