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Author Question: Polygraph tests work by measuring a. eye movements b. physiological arousal c. muscle movement ... (Read 42 times) |
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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.
In 1864, the first barbiturate (barbituric acid) was synthesized.