Energy Balance
Energy Balance - Related Videos
01:19
Energy Balance
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2024
The human body gets energy from the three macronutrients: carbohydrates, proteins, and fats. Energy is released when the chemical bonds in the organic compounds present in the food are broken down. The energy content of food is measured in kilocalories (kcal), defined as the amount of heat required to raise the temperature of one kilogram of water by one degree Celsius. This value is determined by measuring the temperature change of the water surrounding a calorimeter after the complete...
07:03
Assessment of Motor Balance and Coordination in Mice using the Balance Beam
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Cited by 395 •
2011
Deficits in fine motor coordination can be assessed with the balance beam test. Performance on the beam is quantified by the speed at which the beam is traversed and the number of times the mouse slips on the beam.
02:58
Balancing Redox Equations
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2020
Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or redox reactions. These important reactions are defined by changes in oxidation states for one or more reactant elements and include a subset of reactions involving the transfer of electrons between reactant species. Electrochemistry as a field has evolved to yield sufficient insights on the fundamental principles of redox chemistry and multiple...
09:05
Balance and Coordination Testing
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2023
Balance and coordination are critical components involved in the control of movement. Many sensory receptors and neural processing units are required to help individuals maintain balance while performing various activities. Deficits in balance and coordination occur in patients suffering from movement disorders or due to aging. Therefore, scientists are trying to understand the pathophysiology behind these conditions. One way to do that is by using rodent models and testing them on behavioral...
02:00
Internal Energy
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2020
The total of all possible kinds of energy present in a substance is called the internal energy (U), sometimes symbolized as E. Suppose a system with initial internal energy, Uinitial, undergoes a change in energy (transfer of work or heat), and the final internal energy of the system is Ufinal. Change in internal energy equals the difference between Ufinal and Uinitial. Although the values for Ufinal and Uinitial cannot be determined for a system, the first law of thermodynamics only...
FAQs
At the cellular level, nutrient breakdown releases chemical energy that cells convert into ATP, a molecule used to power cellular work. ATP supports cellular activity, linking nutrient processing to biological function. Examining this conversion helps explain how changes in nutrient availability can affect growth, survival, and homeostasis.
Energy surplus does not simply disappear: biological systems can direct some of it into storage, particularly fat or glycogen. Conversely, greater demands can be met through altered metabolic activity, movement, or heat production. Tracking these responses clarifies why body mass and physiological state can change over time.
Homeostasis depends on adjusting several energy-related processes rather than changing food intake alone. Organisms may alter intake, metabolic activity, movement, and heat production as demands shift. Studying these coordinated responses helps distinguish a short-term adjustment to changing conditions from a persistent mismatch between energy acquired and energy used.
The relevant accounting changes with biological scale. In cells, attention centers on nutrient breakdown and ATP production; in organisms, researchers consider intake, expenditure, storage, and heat; across ecosystems, the focus broadens to energy flow from organisms. This multiscale view connects cellular chemistry with physiology, ecology, and evolutionary biology.
An investigation can begin by organizing observations into energy acquired, used, stored, and lost, then relating those categories to food intake, metabolic activity, movement, heat production, and body-mass change. Researchers can compare these factors under different demands or conditions. The resulting pattern indicates whether the system is maintaining, storing, or drawing down energy.
Energy balance research is useful when examining metabolic disorders, nutritional effects, environmental adaptation, or evolutionary differences. The framework can reveal whether an outcome reflects altered acquisition, increased use, changed storage, or greater loss. In biology, that interpretation links organism-level observations to questions about survival, regulation, and responses to environmental conditions.