Which Statement Concerning Cross Bridges Is Correct

question 53

Multiple Choice

Which statement concerning cross bridges is correct?

• A) They extend between the A and I bands and bend to pull the bands together during muscle contraction.
• B) They are formed by the spherical actin molecules.
• C) They extend from the thick filaments and bind to actin, then bend to pull the thin filaments in closer together during muscle contraction.
• D) The A band is shorter.

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