What is the function of the sodium -calcium exchanger in cardiac muscle?
A) trigger the release of calcium from the sarcoplasmic reticulum
B) depolarize the cell
C) remove calcium from the cytosol by transporting it to the extracellular fluid thereby relaxing the muscle
D) interact with troponin to initiate cross -bridge cycling
E) remove calcium from the cytosol by transporting it into the sarcoplasmic reticulum

Question

Quizplus · Accepted Answer

The sodium-calcium exchanger in cardiac muscle cells functions to remove calcium from the cytosol by transporting it into the extracellular fluid, which helps in the relaxation of the muscle. This process is crucial for the proper relaxation and filling of the heart chambers between contractions.

What Is the Function of the Sodium -Calcium Exchanger in Cardiac