physio Q - drkap

[ArchivalUser]

micro electrodes placed into cardiac muscle cells detect a rapid decrease in cytoplasmic calcium levels immediately preceding relaxation . which of the following mediates the observed response.

ANS A . Voltage dependent calcium channels
B. Ryanodine receptors
C. Na+/ca+2 exchange mechanism
D. Troponin c
E. calmodulin

[ArchivalUser]

is it c?

[ArchivalUser]

well done its C. Ca +2 ATPase and na+/ ca+2 play a role in relaxation.

[ArchivalUser]

yes and this pump is located at which membrane?sarco or cell membrane