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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

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ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Primary and secondary immune responses. Primary and secondary immune responses.
Early Spectroscope Early Spectroscope
The vehicle emissions control information (VECI) sticker is placed under the hood. The vehicle emissions control information (VECI) sticker is placed under the hood.
The process of pharmacokinetics The process of pharmacokinetics
In oogenesis, cells enter meiosis as primary oocytes In oogenesis, cells enter meiosis as primary oocytes
Early growth of corn (Zea mays), a typical monocot. Early growth of corn (Zea mays), a typical monocot.
Video: Simple Diffusion - Ion transport

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