(Solved): 3. The figure illustrates the signalling pathway in supraventricular myocytes. (Modified from Musca ...

3. The figure illustrates the signalling pathway in supraventricular myocytes. (Modified from Muscarinic receptor agonists and antagonists: effects on cardiovascular function. Robert Harvey) A) Circle the possible protein drug targets on the figure and classify them. (2 mark) B) Indicate directly in the figure: agonists, receptor classification and effectors. Fill in the rectangle with the second messenger involved in this signalling pathway. (4 marks) C) Which G proteins are involved? Indicate which receptor is coupling to which G protein. (2 mark)