Excitation contraction coupling phase of muscle contraction: match these steps of excitation contraction coupling phase muscle contraction according to the most likely numerical order in which they might occur.
a. Release of calcium ions from the sarcoplasmic reticulum
b. Generation of an action potential along the sarcolemma
c. Binding of calcium ions to troponin
d. Conformational change in the troponin-tropomyosin complex
