Endocrine gland hormones at target cells "Permissiveness" is the situation in which a hormone cannot exert its full effects without the presence of another hormone. "Synergism" occurs when two or more hormones produce the same effects in a target cell and their results are amplified. "Antagonism" occurs when a hormone opposes or reverses the effect of another hormone. The endocrine glands belong to the body's control system. The hormones which they produce help to regulate the functions of cells and tissues throughout the body. Endocrine organs are activated to release their hormones by humoral, neural or hormonal stimuli. Negative feedback is important
GreenScreen for Safer Chemicals GreenScreen for Safer Chemicals The GreenScreen for Safer Chemicals is a transparent, open standard for assessing chemical hazard that supports alternatives assessment for toxics use reduction through identifying chemicals of concern and safer alternatives. It is used by researchers, product formulators and certifiers in a variety of industries, including building products, textiles, apparel, and consumer products. The GreenScreen prioritizes the avoidance of substances with a high hazard as a carcinogen, mutagen, reproductive toxicant or developmental toxicant or endocrine disruptor or that are a persistent, bioaccumulative and toxic substance (PBT). The GreenScreen protocol is published in a Guidance document that is