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Your Energy Needs

Author(s): Nancy Moreno, PhD, and Paula Cutler, BS.


Energy fuels growth, movement and all the processes inside every cell inside the body. Energy itself can be thought of as the ability to do work (including movement). We obtain the energy we need from food, which is broken down inside our bodies and within individual cells.

Metabolism refers to all the chemical reactions inside a living organism. In addition to making energy available for use in cells, metabolism releases small amounts of heat (as observed in the yeast cultures in the activity, “Energy for Life”).

Not every person needs the same amount of food. Our energy needs depend on a number of factors, including body size, age, gender and level of physical activity. 

Funded by the following grant(s)

National Space Biomedical Research Institute

National Space Biomedical Research Institute

This work was supported by National Space Biomedical Research Institute through NASA cooperative agreement NCC 9-58.