Arrange the following list of biochemical events in the correct sequence. (1) An action potential is conducted deep into the muscle fiber by the T tubule.(2) Calcium ions bind to troponin.(3) The membranes of the sarcoplasmic reticulum become more permeable to calcium ions.(4) Calcium ions diffuse into the sarcoplasm around the myofibril.(5) The troponin-tropomyosin complex moves exposing active sites.
A. 1, 3, 2, 5, 4
B. 1, 5, 2, 3, 4
C. 1, 4, 3, 2, 5
D. 1, 2, 3, 4, 5
E. 1, 3, 4, 2, 5
Answer: E
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