Definition. Active Transport uses ATP to pump molecules AGAINST/UP the concentration gradient. Transport occurs from a low concentration of solute to high concentration of solute. Requires cellular energy. Movement of molecules DOWN the concentration gradient.
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Mika Emilie Leonia Brzezinski is an American news presenter and author who currently co-hosts MSNBC's weekday morning broadcast show Morning Joe. She was formerly a CBS News correspondent, and was their principal Ground Zero reporter during the morning of the September 11, 2001 attacks. In 2007, she joined MSNBC as an occasional anchor, and was subsequently chosen as co-host of Morning Joe. Mika Brzezinski is a visiting fellow at the Harvard Institute of Politics. Her main political interest i