Question 1: Metal ions, such as Na+, K+, Mg2+, or Ca2+, require ion pumps or ________ to cross membranes and distribute through the body | |||
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Question 2: In ________, active transport involves the transportation of things from a region of lower concentration to a higher concentration. | |||
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Question 3: If the process uses chemical energy, such as from ________ (ATP), it is termed primary active transport. | |||
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