Final answer:
Synergistic combinations are more effective because they produce an amplified response, while antagonistic combinations are less effective as they cancel each other out.
Step-by-step explanation:
Synergistic combinations are more effective because they produce an amplified response, where two hormones with similar effects work together to provide a stronger result. For example, the hormones FSH and estrogens are both required for the maturation of female ova in the reproductive system. On the other hand, antagonistic combinations are less effective as two hormones with opposing effects cancel each other out. An example of this is the pancreatic hormones insulin and glucagon, where insulin decreases blood glucose levels while glucagon increases blood glucose levels.