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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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There are approximately 3 million unintended pregnancies in the United States each year.

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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

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Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

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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 testes. In addition to producing sperm, the testes secrete the male sex hormones, primarily test The testes. In addition to producing sperm, the testes secrete the male sex hormones, primarily test
(A) The male pelvis (android) is shaped like a funnel, forming a narrower outlet than the female. (B (A) The male pelvis (android) is shaped like a funnel, forming a narrower outlet than the female. (B
Urinary catheterization. The procedure involves the insertion of a flexible tube, or catheter, throu Urinary catheterization. The procedure involves the insertion of a flexible tube, or catheter, throu
Disorders of the Male Reproductive System Disorders of the Male Reproductive System
A pedigree for a Y-linked trait. These traits are transmitted from males to all male offspring in ea A pedigree for a Y-linked trait. These traits are transmitted from males to all male offspring in ea
Video: Role of the respiratory system - effect of altered ventilation rates

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