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Directions: Before you start, listen to part of a talk in a biology class.
*Vocabulary is sometimes provided in written form when it may be unfamiliar to the student but essential for understanding the lecture
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| Vocabulary |
|---|
| bioenergetics |
| cell metabolism |
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Scientists use the term bioenergetics to describe the concept of energy flow through living systems, such as cells. Cellular processes such as the building and breaking down of complex molecules occur through step-wise chemical reactions. Some of these chemical reactions are spontaneous and release energy, whereas others require energy to proceed. Just as living things must continually consume food to replenish their energy supplies, cells must continually produce more energy to replenish that which is used by the energy-requiring chemical reactions that constantly take place. Together, all of the chemical reactions that take place inside cells, including those that consume or generate energy, are referred to as the cell’s metabolism.
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