According to the CDC, on September 14th, 2014 a man traveling from Liberia to Dallas, Texas was the first person to be diagnosed in the U.S. He did not have any symptoms when he left Liberia.
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Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
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In psychology, the term self-esteem is used to describe a person's overall sense of self-worth or personal value. In other words, how much you appreciate and like yourself. Self-esteem is often seen as a personality trait, which means that it tends to be stable and enduring.
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