Card 18 / 34: According to Joe's slides, what is the first step in muscle contraction?
A)
Ca++ is released from SR
B)
Resting fiber; cross bridge is not attached to actin.
C)
Cross bridge binds to actin.
D)
Pi is released, causing conformational change in myosin.
E)
ATP is hydrolyzed, causing cross bridge to return to its original orientation.
Answer:
B) Resting fiber; cross bridge is not attached to actin.
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Nick Swain |
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