Physiology Post-tetanic facilitation is thought to be the result of which of the following? A Opening of voltage-gated sodium channels B Opening of transmitter-gated potassium channels C A buildup of calcium in the presynaptic terminal D Electrotonic conduction 💡 Explanation Post-tetanic facilitation is thought to be the result of which of the following? ✓ Correct Answer: C. A buildup of calcium in the presynaptic terminal