Physiology If refractory period of nerve is 1/2500th of a second, what can be the maximum frequency of excitation of the nerve? A 100 times/sec B 250 times/sec C 2000 times/sec D 2500 times/sec 💡 Explanation If refractory period of nerve is 1/2500th of a second, what can be the maximum frequency of excitation of the nerve? ✓ Correct Answer: D. 2500 times/sec