Which membrane protein transport process plays an important role in terminating the contraction of cardiac muscle?

A. Ca 2+-ATPase pumps move Ca2+ from the T-tubule back into the sarcoplasmic reticulum.
B. Na+/K+-ATPase pumps move Na+ back into the cytosol and K+ back into the T-tubule lumen.
C. Ca2+-ATPase pumps move Ca2+ from the cytosol back into the sarcoplasmic reticulum.
D. Na+/Ca2+-exchangers move Na+ out of the cytosol in exchange for Ca2+ movement into the sarcoplasmic reticulum.
E. Na+/K+-ATPase pumps move Na+ and K+ back out of the cell.


C

Anatomy & Physiology

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