Which Statement About Excitation-Contraction Coupling Is Incorrect

question 88

Multiple Choice

Which statement about excitation-contraction coupling is incorrect?

• A)Calcium ion is released from 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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Definitions:

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