Sunday, 21 June 2009

During fever, whether the temperature of the whole body increases?

During fever, whether the temperature of the whole body increases?
No. (1) If the temperature of whole body increases, the body will not try the heat generating methods like, shivering, shrinking of blood vessels, increased respiration and heat beat.
(2) The body is not sweating.
(3) Body likes to have more heat generating techniques like covering with a blanket, hot food intake, etc. (4) The body avoids heat losses, like reduced output of motion, closed hair-holes for avoid sweating, etc.
So it is clear that the temperature increased is in a plane and the heat loss is in a different plane.
If the decrease in heat of the body is the cause of fever, how the low heat of fever creates a higher temperature in the body?
The higher heat of fever is the cumulative action of increased activity by heart, lungs, shivering of muscles, etc.
Whether the temperature difference between the atmosphere and the body creates shivering?
Yes. If the temperature difference is more than 15oC, it will.
Will shivering be there for those do not have difference in the heat of outer body and atmosphere?
Yes. Shivering will be there, during inner fever, administrating glucose (I V) Fluid, after frightening, muscles loss strength, during fits /epilepsy, etc, but there will not be having much difference in the temperature.

Tuesday, 16 June 2009

The Physics Of fever-Why fever?

The Physics Of fever
1.Why fever?

When the body or its parts are affected with some fatigue, it undergoes a self defence mechanism that allows it to take rest and prevent the heat from deterioration.
To prevent loss of heat from the body, heat is kept in different planes. It can be understood in a simple manner as the inner heat and the outer heat. The internal heat of the body or a part of it may decrease due to physiological, mental and circumstantial reasons. For maintaining proper health, a certain level of heat is mandatory. If the heat decreases than a certain level, it is fatal for the organ or the body and there is a threat for even life. So when we lose heat, body will watch it till a limit and then will initiate its life saving act. As per the "law of thermodynamics" heat preserves heat. To avoid further loss from the existing heat of the body, rest is necessary. Body achieves rest, by making many difficulties for the normal functioning.
Here body try to generate heat in the peripheries in different methods.
1. Heart beat is increased. But the blood vessels are shrinked to offer more resistance to the flow to generate heat there.
2. Respiration rate is increased.
3. The muscles start shivering.
4. Normal activities are decelerated to stop loosing the existing internal heat. It includes but not limited to
o Reduced appetite.
o Reduced excretion of motion.
o Reduced digestion.
Increased fatigue of mind and body results in resting.