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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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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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People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.
Structure and basic function of a typical vertebrate neuron and associated glial cells.
Internal and external attributions
A typical electric cooling fan assembly showing the radiator and related components.
A typical General Motors HEI coil installed in the distributor cap. When the coil or distributor cap ...
Typical joint changes associated with osteoarthritis.
Typical Night’s Sleep for a Young Adult