energy
To view the entire topic, please sign in or purchase a subscription.
Nursing Central is the award-winning, complete mobile solution for nurses and students. Look up information on diseases, tests, and procedures; then consult the database with 5,000+ drugs or refer to 65,000+ dictionary terms. Explore these free sample topics:
-- The first section of this topic is shown below --
(en′ĕr-jē )
[Gr. energeia, activity]
In physics, the capacity to do work, effect change. Energy is manifested in motion (kinetic energy) or position or chemical bonding (potential energy).
Changes in energy may be physical, chemical, or both. Movement of a part of the body shortens and thickens the muscles involved and temporarily changes the position and size of cells, but intake of oxygen in the blood combined with glucose and fat creates a chemical change and produces heat (energy) and waste products within the cells; fatigue is produced in turn.
SEE: calorie; SEE: energy expenditure, basal
-- To view the remaining sections of this topic, please sign in or purchase a subscription --