You Are Taking Notes in Lecture,writing as Fast as You

question 12

Multiple Choice

You are taking notes in lecture,writing as fast as you can,when suddenly your hand become so stiff that you can't write any more! You pull the pencil from between your frozen fingers with your other hand,and after a few worried moments your hand is able to relax again.What happened?

• A) The muscles in your hand depleted their supply of ATP, and the myosin heads could not detach from actin.
• B) The muscles in your hand depleted their supply of acetylcholinesterase.
• C) The muscles in your hand depleted their supply of Ca²⁺, and the myosin heads could not attach to actin.
• D) The actin and myosin filaments in your hand muscles became detached from their Z lines.
• E) The motor neurons stimulating your hand muscles depleted their supply of acetylcholine.

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