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About 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium. All 11 are necessary for life.
1 Ιαν 2018 · This paper proposed the scientific hypothesis that human beings have an “energy system” inside their body and put forward the necessity to propose the hypothesis. In details, this paper explained the hypothesis from its existence, composition, functions, and possible verifying methods.
Humans obtain energy from three classes of fuel molecules: carbohydrates, lipids, and proteins. The potential chemical energy of these molecules is transformed into other forms, such as...
Further, there is a distinction to be made between calorific energy and levels of cortisol, a hormone that is released in response to stress—in other words, chemical energy potential in the body compared with hormones that influence mental energy.
Four forms of energy essential to human functioning are: chemical energy (which is stored and released as chemical bonds are formed and broken), mechanical energy (which directly powers physical activity), radiant energy (emitted as waves such as in sunlight), and electrical energy, the power of moving electrons.
During the chemical reactions of photosynthesis, energy is provided in the form of a very high-energy molecule called ATP, or adenosine triphosphate, which is the primary energy currency of all cells.
The human body converts energy stored in food into work, thermal energy, and/or chemical energy that is stored in fatty tissue. The rate at which the body uses food energy to sustain life and to do …
