If all of the Ca2+ within a muscle fiber was removed, which of the following could still occur?
A. The heads of the myosin molecules would return to their resting position, and the recovery stroke would occur.
B. The heads of the myosin myofilaments would bind to G-actin to form cross-bridges.
C. The troponin molecules bound to G actin molecules would be released, causing tropomyosin to move.
D. An action potential that was produced at the neuromuscular junction would be propagated along the sarcolemma.
Answer: A
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