QUESTION 21
Which of the following is not a correct statement about thesliding-filament model of muscle contraction?
Actin crossbridges detach from the myosin filaments with energyfrom ATP hydrolysis
A major conformational change in relative size occurs within thesarcomere's zones and bands
A muscle shortens or lengthens because the thick and thinfilaments slide past each other
The thick and thin filaments do not change length
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