What role does energy play in living organisms' energy budgets, and give an example from humans or animals.

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Multiple Choice

What role does energy play in living organisms' energy budgets, and give an example from humans or animals.

Energy budgets show how living things use the energy they obtain to run their bodies. That energy powers metabolism—the chemical reactions that keep cells alive—plus growth and movement. In humans and animals, calories from food are used to generate body heat and to fuel activities like walking, running, and lifting. Any surplus energy can be stored as fat or glycogen for later use. So energy isn’t just stored forever or coming only from sunlight, and it isn’t used only for digestion—the energy from food drives many processes that keep us alive and active.

Energy budgets show how living things use the energy they obtain to run their bodies. That energy powers metabolism—the chemical reactions that keep cells alive—plus growth and movement. In humans and animals, calories from food are used to generate body heat and to fuel activities like walking, running, and lifting. Any surplus energy can be stored as fat or glycogen for later use. So energy isn’t just stored forever or coming only from sunlight, and it isn’t used only for digestion—the energy from food drives many processes that keep us alive and active.

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