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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.
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Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.
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The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Pocket gophers and ecosystem structure (data from Huntly and Inouye 1988).
The upper panel shows that scores of four diverse samples of boys on a moral reasoning test show a ...
Selective breeding of maze-bright and maze-dull strains of rats by Tryon (1934). (Data from Cooper, ...
Pavlov’s Original Classical Conditioning Procedure
Flow cytometry data that shows the differences in CD3+ CD4+ cells that occur with HIV infection. ...
How to calculate the mean for grouped data