As with the public health effects, the effects of high intensity electromagnetic fields on rectenna site workers * health have not been evaluated . *Mean corpuscular volume: size of red blood cells; osmotic regulations: regulation of fluid flow between body compartments; bone marrow inhibition causes a slowing down or cessation of new cell production. **Reticulocytosis: manufacture of young red blood cells; erythropoietic mechanisms regulate the manufacture of red blood cells. ^Endogenous compounds are those originating within the body. ttPlasma is the fluid component of the blood. 2.6.3 Effects on Space Workers The health and safety problems related to the uniqueness of the space environment can be grouped into three general categories. These are weightlessness (zero gravity), life support, and the effects of the radiation environment. 2.6.3.1 Weightlessness Weightlessness resulted in a number of physiological and biochemical alterations in astronauts during earlier space flights. NASA has ongoing research programs on the problems of weightlessness. The red cell mass was significantly reduced. This reduction was possibly due to reduced red cell survival, deformed red cells that may lead to their removal from the circulatory blood, increase in mean corpuscular volume and changes in osmotic regulation, total red cell lipids and/or bone marrow inhibition. * Reticulocytosis was delayed after return to earth, implying that erythropoietic mechanisms were insensitive to loss of red cell mass during flight. ** (in the longest flights, it appeared red cell mass loss was at least partially arrested and that adaptation might be occurring.) There were some changes seen in the cellular immune system immediately post-flight but the significance of these changes appears to be in doubt. These changes may have been stimulated by elevations of endogenous compounds,+ such as cortisol and/or catecholamines. Plasma volume was decreased, apparently happening in the first few hours of weightlessness. This may be due simply to shifts between various fluid compartments due to weightlessness.
RkJQdWJsaXNoZXIy MTU5NjU0Mg==