Consider the events involved in the stimulation of heart muscle. Arrange the events in the stimulation of heart muscle in sequence. Note that this question does not list every step in the pathway, but the steps presented should be arranged in order.

1. Activation of G-proteins

2. Activation of adenylyl cyclase

3. Conversion of ATP into cyclic AMP

4. Activation of protein kinase A

5. Phosphorylation of proteins that induce contraction in muscle cells

answer///cannot be totally predicted;

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