Why is the consequence of epinephrine signaling so different for cardiac cells and hepatocytes?
The epinephrine receptors on the surface of their target cells are different.
The epinephrine receptors are more abundant on the surface of cardia cells.
Different amounts of epinephrine reach each different type of target cell.
The downstream signaling components stimulated by the activated epinephrine receptor are different in cardiac cells and hepatocytes.
There is no difference in the responses of these cell types to epinephrine.
