Final answer:
Antagonists are hormones that act on the same target cells but have opposite effects. Insulin and glucagon are examples of antagonistic hormones that regulate blood glucose levels.3) antagonists
Step-by-step explanation:
Hormones that act on the same target cells yet have opposite effects are said to be antagonists. Antagonistic hormones have opposing effects on their target cells. For example, insulin and glucagon are two pancreatic hormones that have antagonistic effects on blood glucose levels. Insulin decreases blood glucose levels by promoting the storage of glucose as glycogen, whereas glucagon increases blood glucose levels by stimulating the breakdown of glycogen stores.