阿摩線上測驗
29. Regarding the mechanisms of contraction in skeletal and smooth muscle, which of the following statements is correct?
(A) Both muscle types require influx of extracellular Ca2+ to initiate contraction.
(B) In skeletal muscle, Ca2+ binds to troponin, whereas in smooth muscle, Ca2+ binds to calmodulin to initiate contraction.
(C) Both muscle types require transverse tubules to elevate intracellular Ca2+ concentration.
(D) Tropomyosin participates in contraction in skeletal muscle but not in smooth muscle.
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統計： A(0), B(9), C(1), D(2), E(0) #3839964
統計： A(0), B(9), C(1), D(2), E(0) #3839964
