Synergistic versus Antagonistic Effects
Synergistic Effect : when the effect of two or more hormones acting together is greater or more extensive than the effect of each individual hormone acting alone.
Antagonistic Effect : when one hormone opposes the effects of another hormone
Control of Hormone Secretion
Regulation of hormone secretion normally prevents overproduction or underproduction of any hormone. Hormone secretion is regulated by:
Signals from the nervous system Chemical changes in the blood Other hormones Circadian rhythms/sleep/light
Most hormonal regulation works via Negative Feedback, but a few operate on Positive Feedback.
205
Made with FlippingBook Publishing Software