What is the correct order for the following events that follow a nerve impulse along a sympathetic neuron to innervate

the heart?
1) G protein activates adenylyl cyclase
2) Neuron releases norepinephrine
3) Cyclic AMP activates protein kinase
4) Receptor activates G protein
5) Protein kinase phosphorylates Ca2+ channels
6) Receptors activated on the membrane of the cardiac muscle
a. 1, 3, 4, 5, 2, 6
b. 5, 3, 4, 1, 2, 6
c. 6, 2, 4, 1, 3, 5
d. 2, 6, 4, 1, 3, 5


e. 2, 3, 4, 1, 6, 5


d

Biology & Microbiology

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