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Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

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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.

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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

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The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Common skin signs. Each of the illustrations depicts a section through skin Common skin signs. Each of the illustrations depicts a section through skin
Measles. A photograph of a child stricken with measles, showing the tell-tale sign of the skin rash. Measles. A photograph of a child stricken with measles, showing the tell-tale sign of the skin rash.
Intramuscular drug administration: (a) cross section of skin showing depth of needle insertion Intramuscular drug administration: (a) cross section of skin showing depth of needle insertion
Capillary puncture sites. Capillary puncture sites.
Use face cradle covers to prevent the client’s skin from touching the face cradle upholstery. Use face cradle covers to prevent the client’s skin from touching the face cradle upholstery.
Rapping. Tapotement performed with the knuckles of a loosely closed fist, as if rapping lightly on a ... Rapping. Tapotement performed with the knuckles of a loosely closed fist, as if rapping lightly on a ...
Video: Action potentials - electrical characteristics and generation

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