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Complete the sentence. Oxygen moving from the bloodstream into a cell down a concentration gradient is a form of _____. A. osmosis B. endocytosis C. active transport D. passive transport

User Splaktar
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Oxygen moving from the bloodstream into a cell down a concentration gradient is a form of passive transport. This is because it is moving from a level of high concentration to an area of low concentration and because there is little energy being used which means passive.
User Zohar Etzioni
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