Why do you think a muscle produces a stronger contraction after extensive weight training, even though the number of muscle cells doesnt change?

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    The number of thick and thin filaments increases in each muscle cell, allowing a sarcomere to form more cross-bridges and thus a stronger contraction.
    A greater number of action potentials is sent to a trained muscle, thus generating stronger contractions.
    A trained muscle has more motor units than an untrained one, resulting in the potential for stronger contractions.
    All of the above are correct.

asked May 30, 2013 in Biology by anonymous
    

1 Answer

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The number of thick and thin filaments increases in each muscle cell, allowing a sarcomere to form more cross-bridges and thus a stronger contraction.
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)



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