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.
Correct Answer:
Verified
Correct Answer:
Verified
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