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

Answer;

-The two hormones bind to different receptors and use a different second messenger.

Explanation;

-Most hormones circulate in blood, coming into contact with essentially all cells. However, a given hormone usually affects only a limited number of cells, which are called target cells. A target cell responds to a hormone because it bears receptors for the hormone.

-Insulin and glucagon are hormones secreted by islet cells within the pancreas. They are both secreted in response to blood sugar levels, but in opposite fashion.

they deliver oxygen to the blood