The term synergistic action of hormones refers to

1. When two hormones act together but bring about opposite effects.
2. When two Hormones act together and contribute to the same function.
3. When one Hormone affects more than one function
4. When many hormones bring about anyone function

(b) Synergistic effect means when two hormones work together, they increase the effect or functioning of each other so, there will be enhanced effect of both the hormones.