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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).

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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

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The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

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Many supplement containers do not even contain what their labels say. There are many documented reports of products containing much less, or more, that what is listed on their labels. They may also contain undisclosed prescription drugs and even contaminants.

Varicella or chickenpox, a viral skin infection. In this photograph, the rash is beginning to form s Varicella or chickenpox, a viral skin infection. In this photograph, the rash is beginning to form s
A freshly applied autograft. Note that the donor skin has been perforated so that it can be stretche A freshly applied autograft. Note that the donor skin has been perforated so that it can be stretche
Common skin signs are often evidence of an illness or disorder. A vesicle is a small fluid filled ... Common skin signs are often evidence of an illness or disorder. A vesicle is a small fluid filled ...
Pin the skin and subcutaneous fascia on a spot on the back using the thumb of one hand; place the ... Pin the skin and subcutaneous fascia on a spot on the back using the thumb of one hand; place the ...
Apply circular friction around the knee with the heels of the hands moving the skin over soft ... Apply circular friction around the knee with the heels of the hands moving the skin over soft ...
Inflamed skin (dermatitis) can result from pellagra Inflamed skin (dermatitis) can result from pellagra
Video: Fractures Animation

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