試題詳解

58. Which of the following statements about the regulation of skeletal muscle contraction is FALSE?
(A) Acetylcholine releases and triggers an action potential in muscle fiber.
(B) Action potential is propagated along plasma membrane and down T tubules.
(C) Action potential triggers Ca2+ release from sarcoplasmic reticulum (SR).
(D) Ca2+ bind to tropomyosin and release myosin-binding sites to initiate muscle contraction.
(E) Amyotrophic lateral sclerosis (ALS) is a disease of muscle fibers atrophy caused by motor neuron degeneration.