Frоg skeletаl muscle cоntаins thick filаments that are 3.0um lоng and thin filaments 2.0 um long. If the uncontracted sarcomere is 4.4 um long, and the contracted sarcomere is 3.4 um long, what is the length of the A bands in micrometers [1] and I bands [2] before contraction? And after contraction what is the size of the A band [3] and I bands [4] in micrometers? Your answer should be a number with one figure after a decimal point like 1.0 or 1.1 as examples.
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