Multiple Choice
Figure 40-5
Use the figure to answer the corresponding question(s) . 
-Refer to Figure 40-5.The molecules required to bind at the sites labeled 1 and 2 for a cross bridge to form are:
A) Ca2+ and myosin.
B) ADP and myosin.
C) myosin and troponin.
D) ATP and Ca2+.
E) tropomyosin and O2.
Correct Answer:

Verified
Correct Answer:
Verified
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