If calcium is not present in the muscle cell what complications can occur in regards to muscle contraction?
A. Tropomyosin will not be pulled away from the myosin binding sites.
B. The power stroke will not be produced preventing the actin filament from moving.
C. Myosin heads will not bind to the actin filament.
D. All of these are complications resulting from a lack of calcium.
Answer: D
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