Physiology Na+: Ca++ binding ratio on the sodium-calcium exchanger (NCX) in the myocardial fibers is:- A 1:01 B 1:03 C 3:01 D 4:01 💡 Explanation Na+: Ca++ binding ratio on the sodium-calcium exchanger (NCX) in the myocardial fibers is:- ✓ Correct Answer: C. 3:01