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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).