Word: bloodstreams
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They then removed the lymphocytes from the mixture and injected them back into the bloodstream, helping the body to destroy the disease...
...rare display of virtuosity. Michael Brown of the University of Texas Health Science Center at Dallas vividly described the twelve years of work that he and Colleague Joseph Goldstein had carried out on the low-density lipoprotein (LDL) receptor, a molecule that ferries cholesterol-rich particles from the bloodstream into the cell. His explanations were crisply organized, and his slides went beyond standard diagrams to include photographs of patients. Said one listener of Brown and Goldstein: "Their work is dazzling...
Although cholesterol is popularly regarded as an enemy, the body needs it to manufacture new cell membranes, steroid hormones and bile acids. Made primarily in the liver and also obtained through food, cholesterol travels through the bloodstream in round bundles of fat and protein called lipoproteins. Like Venus's-flytraps, vacant LDL receptors snare the passing packets. The lipoproteins are rapidly broken down in the cell, and the cholesterol is freed for use, while the receptor returns to the membrane, ready for prey...
...AIDS symptoms themselves but could give the disease to others). Many prostitutes are also intravenous drug users, the group at second-highest risk of developing AIDS because of the frequent - sharing of needles. Researchers speculate that male customers of infected prostitutes may risk absorbing the AIDS virus into their bloodstream from vaginal discharge during intercourse, though that form of transmission has not been proved...
...pills' safety and effectiveness, even though they were merely copies of medicines already being sold. Under the new law, firms need only show that their generic pills are the chemical equivalents of brand-name drugs and deliver the same amount of medicine with the same speed into the bloodstream. Because of this change in the rules, industry experts predict that within a year or two, generic copies of perhaps 150 leading brand-name drugs will appear. They include Valium, a tranquilizer, Diabinese, a pill to control diabetes, and Motrin, a medicine for arthritis. Hemant Shah, a drug-industry specialist...