Physiology The function of Phospholamban is A Regulates Na+ K+ pump B Transports calcium out of the mitrochondria C Binds actin with myosin D Inhibits Ca++ pump on sarcoplasmic reticulum 💡 Explanation The function of Phospholamban is ✓ Correct Answer: D. Inhibits Ca++ pump on sarcoplasmic reticulum