Put the following events in order.
The junctional fold of the motor end plate
must be depolarized and a wave of
depolarization travels along the sarcolemma
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The transverse tubules carry the depolarizing
current to the interior of the muscle cell where
they activate voltage-sensitive channels to
change shape.
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This shape change opens calcium-release
channels in the terminal cisterns of the
sarcoplasmic reticulum.
Calcium floods into the sarcoplasm
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