Starting with the Arrival of an Action Potential at the Neuromuscular

question 58

Multiple Choice

Starting with the arrival of an action potential at the neuromuscular junction,which is the correct order of events?

• A) Calcium is released from the sarcoplasmic reticulum,an action potential travels down the T tubule,depolarization spreads through the T tubule,and myosin binds actin.
• B) An action potential travels down the T tubule,depolarization spreads through the T tubule,calcium is released from the sarcoplasmic reticulum,and myosin binds actin.
• C) An action potential travels down the T tubule,depolarization spreads through the T tubule,calcium is taken up by the sarcoplasmic reticulum,and myosin binds actin.
• D) An action potential travels down the T tubule,depolarization spreads through the T tubule,ATP binds to myosin,and myosin binds actin.
• E) The T tubule is depolarized,calcium is released from the sarcoplasmic reticulum,an action potential is created in the muscle cell,and myosin binds actin.

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