Which of the following conditions is likely to decrease the likelihood of skeletal muscle contraction?
(a) partial depolarization of the T-tubule membrane, such that the resting potential is closer to zero
(b) addition of a drug that blocks Ca2+ binding to troponin
(c) an increase in the amount of ATP in the cell
(d) a mutation in tropomyosin that decreases its affinity for the actin filament
Answer:
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