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MCAT Question A Day - 9/6/14

The function ogap junctionin the intercalated discs of cardiac muscle ito:

A.  anchor the muscle fibers together.
B.  insure that an action potential ispread to all fibers in the muscle network.
C.  control blood flow by selectively opening and closincapillaries.
D.  release calcium into the sarcoplasmireticulum.

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