1 Angiotensin, which is involved in blood pressure control. 2  Adiponectin, which improves the bodyâs sensitivity to insulin and so helps to protect against developing type 2 diabetes.  Lipoprotein lipase and apolipoprotein E, which are involved in storage and metabolism of fat to release energy.
Energy system can refer to: 1  Electric power system, for supply, transmission and consumption of electric power. 2  Thermodynamic system, a physics concept for analysis of thermal energy exchange.  Bioenergetic systems, metabolic processes for converting energy in living organisms.
Heat is energy transferred spontaneously from a hotter to a colder system or body. Heat is energy in transfer, not a property of the system; it is not contained within the boundary of the system. On the other hand, internal energy is a property of a system, and exists on both sides of a boundary. In an ideal gas, the internal energy is the statistical mean of the kinetic energy of the gas particles, and it is this kinetic motion that is the source and the effect of the transfer of heat across a system boundary. The internal energy of an ideal gas can in this sense be regarded as thermal energy.