Word: bloodstreams
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...when cellular glues become too sticky or fail to hold, the outcome is often disastrous. In cancer, for instance, advancing tumors often secrete an enzyme that chews up their matrix, freeing malignant cells to leak into the bloodstream. Some inevitably stick and proliferate at sites elsewhere in the body. Thus the lethal process of metastasis may be viewed as a breakdown in stickiness...
...strain resembling those types found in Africa. Apparently, it preferred the moist mucosal tissue of the genital organs, making heterosexual transmission easier. The other variety, found in the drug abusers, appeared similar to strains detected in the U.S. and Europe. It thrived on immune cells in the bloodstream. As a result, transmission occurred through the exchange of contaminated blood, as might occur during the sharing of needles or in abrasive anal...
...University of Chicago, "the success rate is great, | around 90%." For dust mites, mold and animal dander, the results are more variable. But why the shots do -- and sometimes don't -- work remains a mystery. Medical researchers know, for instance, that administering the allergens directly into the bloodstream results in the production of immunoglobulin G, rather than IgE, antibodies. Does the presence of IgG block the IgE response? Or does the hair-of-the-dog procedure eventually desensitize key cells in the immune system to the offending allergen? No one knows...
...full of calories. Except that the obvious is only part of the story. The Journal of the American Medical Association reports that Swiss physiologists have found that alcohol not only adds calories to the diet but also keeps the body from burning dietary fat properly. Booze in the bloodstream can slow down fat metabolism more than 30% -- though it speeds up the burning of carbohydrates. When fat isn't metabolized, it gets deposited on thighs, hips, stomach and other embarrassing parts of the body. So while one answer to an inappropriately bulging physique might be to give up alcohol entirely...
...behavioral side of their addiction. But Nicorette has proved disappointing, largely because heavy smokers have trouble getting a sufficient dose to match their craving. In addition, the gum can cause soreness in the mouth and upset stomach. Patches overcome these shortcomings by steadily pumping the drug directly into the bloodstream. After a month of daily use, ex-smokers wean themselves from the nicotine by applying successively smaller patches...