Thermoregulation can be defined as the phenomenon of the body by which it regulates the temperature inside the body. The internal temperature of the body has to be maintained even if the temperature in the outer environment is changing.
In case the body encounters colder environment, the muscles of the body contract rapidly producing heat.
The contraction of the muscle requires hydrolysis of ATP molecules which in turn releases energy in the form of heat. This heat is used by the body to maintain an optimum temperature within the body.
A. If the optimum temperature for a cell's functions is exceeded, chemical reactions slow down as enzymes and other proteins begin to denature (change shape due to increased vibration of the atoms in the molecules that make up the proteins).
