Which of These Statements Describes Cross Bridges

question 65

Multiple Choice

Which of these statements describes cross bridges

• A)They extend between the A and the 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 than the I band.

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