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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.

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The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

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Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

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According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

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There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

The structure of a typical flower. The structure of a typical flower.
Acromegaly. Photo of a woman illustrating the enlarged skull, jaw, and hands typical of acromegaly. Acromegaly. Photo of a woman illustrating the enlarged skull, jaw, and hands typical of acromegaly.
A typical ball-peen hammer. A typical ball-peen hammer.
The sensing wire in a typical hot wire mass air flow sensor. The sensing wire in a typical hot wire mass air flow sensor.
A typical catalytic converter with a monolithic substrate. A typical catalytic converter with a monolithic substrate.
The genome of a typical retrovirus is shown at the top of the diagram The genome of a typical retrovirus is shown at the top of the diagram
Video: Enzyme-Catalyzed Reactions

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