Which of the following statements is/are true about muscle contraction? I. During shortening, I bands get reduced
Which of the following statements is/are true about muscle contraction?
I. During shortening, I bands get reduced whereas ‘A’ bands retain their length.
II. The part between the two ‘H’ zones is sarcomere.
III. Binding of Ca2+ with a subunit of troponin leads to the formation of cross bridge.
IV. A-bands contain actin and are light bands.
Choose the correct option.
(a) I, II and III
(b) II and III
(c) I and II
(d) Only III
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