Micro electrodes placed in cardiac muscle cells detect a rapid decrease in cytoplasmic calcium level immediately preceding relaxation. Which of the following mediates the observed response?
A- Voltage dependent calcium channels
B- Ryanodine receptors
C- Na/Ca exchanger pump
D- Troponin C
E- Calmodulin
A- Voltage dependent calcium channels
B- Ryanodine receptors
C- Na/Ca exchanger pump
D- Troponin C
E- Calmodulin