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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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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

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Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

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The human body produces and destroys 15 million blood cells every second.

Mechanisms of Active and Passive Immunity Mechanisms of Active and Passive Immunity
Bolts and screws have many different heads. The head determines what tool is needed. Bolts and screws have many different heads. The head determines what tool is needed.
The lower intake manifold attaches to the cylinder heads. The lower intake manifold attaches to the cylinder heads.
Passive touch by holding the feet lightly. Passive touch by holding the feet lightly.
Apply passive touch on the shoulder and hip. Stand in back and place one hand on the shoulder and ... Apply passive touch on the shoulder and hip. Stand in back and place one hand on the shoulder and ...
The following sentence is written in the passive voice: The man rode his skateboard to work ... The following sentence is written in the passive voice: The man rode his skateboard to work ...
Video: Green alga life cycle Animation

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