Saturday, April 13, 2013

A discussion on the principle ways in which heat is gained and lost by the body, explaining the various mechanisms involved in the regulation of body temperature

Since evolution began Man has spread to all areas of the globe, his ability to stick his body temperature independently of his external surroundings contributes significantly to this success. This appellative get out discuss the methods by which pepperiness is win overd, the effect of this exchange on the body and how it is utilised in thermoregulatory mechanisms. The importance of these regulatory measures will be demonstrated by a skeleton description of the effects on the body when they do not function properly.

Body temperature is not constant, as discussed by Heath (2003), it fluctuates in accordance with endogenous and exogenous variables, such as metabolic process and ambient temperature. Regulatory mechanisms help keep an eye on the core (internal) temperature at heart a narrow range of 36.1°C to 37.8°C (the set point). To keep within this narrow range a balance essential be maintained between agitate loss and heat gain. The body has three mechanisms it can draw on to get this: generating its own heat, gaining heat from the environment and loosing heat to the environment. This movement of heat between the body and surroundings occurs by conduction, convection, radiation and evaporation.

Movement by conduction requires two solid objects in direct tie-in with each other e.g. when standing barefoot heat will be conducted from the soles of the feet to the floor.

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This exchange will continue until contact is upturned or equilibrium is reached, at this point the floor ceases to poop out heat from the feet, acting instead as insulation. As a result, Clark & Edholm (1985) estimate the role of conduction in thermoregulation to be no greater than 2%.

Convection is the transfer of heat by a moving gas or liquid. Heat from the scratch transfers to the surrounding air, as the air is heated is becomes less profound and rises to be replaced by cooler...

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