Both insulin and glucagon are peptide hormones that target liver cells. the response of the target cells to each of these two hormones is opposite. this information implies that a) the two hormones bind to different cell surface receptors. b) one hormone binds to a receptor on the cell membrane and the other to an intracellular receptor. c) each of the two hormones uses a different second messenger. d) both hormones interact with receptors at the cell nucleus. e) the two hormones bind to different receptors and use a different second messenger