Describe the 3 ways in which hormones can interact?

1. Synergistic effects in which two or more hormones act together to produce an effect that is greater than the sum of their separate effects. 2. Permissive effects in which one hormone enhances the target organ's response to a second hormone that is secreted later. 3. Antagonistic effects in which one hormone opposes the action of another. For example, insulin lowers blood glucose level and glucagon raises it.