Q. Regarding the cardiac muscle action potential, which statement is INCORRECT? (Solved)
1. sodium ions enter via “fast” channels in phase 0
2. chloride ions may enter cell during phase 1
3. sodium ions enter via “slow” channels in phase 2
4. relative refractory period ends in phase 3
5. class I anti-arrhythmics reduce the slope of phase 4
- a. sodium ions enter via “fast” channels in phase 0