Final answer:
The term 'synergistic' describes the interaction where the combined effect of two or more hormones is greater than the sum of their individual effects, a phenomenon crucial in complex hormone-regulated processes such as the maturation of ova.
Step-by-step explanation:
When two or more hormones are synergistic, then the response of all the hormones when applied at the same time is greater than the sum of the responses to each hormone applied individually. The synergistic effect occurs when hormones with similar effects produce an amplified response. For example, in female reproductive physiology, FSH from the pituitary gland and estrogens from the ovaries work together for the maturation of ova (egg cells). This is in contrast to an antagonistic effect where hormones have opposing effects, such as insulin and glucagon, which have opposing effects on blood glucose levels in the body.