Which of the Following Choices Gives the Correct Sequence of Events

question 25

Multiple Choice

Which of the following choices gives the correct sequence of events following the depolarization of transverse tubules in excitation-contraction coupling in cardiac muscle?

• A)Calcium release into sarcoplasm, calcium ion influx through sarcolemma, actin and myosin attach, thin myofilaments slide toward the middle of sarcomeres
• B)Actin and myosin attach, thin myofilaments slide toward the middle of sarcomeres, calcium release into sarcoplasm
• C)Calcium release into sarcoplasm, actin and myosin attach, calcium ion influx through sarcolemma, thin myofilaments slide toward the middle of sarcomeres
• D)Calcium release into sarcoplasm, actin and myosin attach, thin myofilaments slide toward the middle of sarcomeres, calcium ion influx through sarcolemma
• E)Calcium ion influx through sarcolemma, calcium release into sarcoplasm, actin and myosin attach, thin myofilaments slide toward the middle of sarcomeres

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