Which of the Following Statements About Excitation-Contraction Coupling Is Incorrect

question 89

Multiple Choice

Which of the following statements about excitation-contraction coupling is incorrect?

• A) Calcium ions travel through the transverse tubule.
• B) Calcium ion is released from the sarcoplasmic reticulum.
• C) Tropomyosin moves to expose myosin binding sites on actin.
• D) Troponin binds calcium ion and signals tropomyosin to move.
• E) Relaxation requires uptake of calcium ion by the sarcoplasmic reticulum.

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