why does dehydration cause a rise in temperature?

Question

exam question i dont get...
explain why dehydration causes less heat to be lost from the skin and one other reason why dehydration can cause a rise in body temperature...

Answer 1

The symptoms become increasingly severe with greater water loss. One's heart and respiration rates begin to increase to compensate for decreased plasma volume and blood pressure, while body temperature may rise because of decreased sweating.



Around 5% to 6% water loss, one may become groggy or sleepy, experience headaches or nausea, and may feel tingling in one's limbs (paresthesia). With 10% to 15% fluid loss, muscles may become spastic, skin may shrivel and wrinkle, vision may dim, urination will be greatly reduced and may become painful, and delirium may begin. Losses greater than 15% are usually fatal.

Symptoms and prognosis

Symptoms may include headaches similar to what is experienced during a hangover, a sudden episode of visual snow, decreased blood pressure (hypotension), and dizziness or fainting when standing up due to orthostatic hypotension. Untreated dehydration generally results in delirium, unconsciousness, and in extreme cases death.

FACTORS AFFECTING DEHYDRATION:

In humans, dehydration can be caused by a wide range of diseases and states that impair water homeostasis in the body. These include:

* External or stress-related causes
o Prolonged physical activity without consuming adequate water, especially in a hot and/or humid environment
o Prolonged exposure to dry air, e.g., in high-flying airplanes (5-15% r.h.)
o Survival situations, especially desert survival conditions
o Blood loss or hypotension due to physical trauma
o Diarrhea
o Hyperthermia
o Shock (hypovolemic)
o Vomiting
o Burns
o Lacrimation

* Infectious diseases
o Cholera
o Gastroenteritis
o Shigellosis
o Yellow fever

* Malnutrition
o Electrolyte imbalance
+ Hypernatremia (also caused by dehydration)
+ Hyponatremia, especially from restricted salt diets
o Consumption of alcohol, caffeine or other diuretic substances.
o Fasting
o Recent rapid weight loss may reflect progressive depletion of fluid volume. (The loss of 1 L of fluid results in a weight loss of 1 kg, or 2.2 lb.)
o Patient refusal of nutrition and hydration

* Other causes of obligate water loss
o Severe hyperglycemia, especially in Diabetes mellitus
+ Glycosuria
ALL THE BEST

Answer 2

The body normally generates heat as a result of metabolism, and the body is usually able to dissipate the heat by either radiation of heat through the skin or by evaporation of sweat. However, in extreme heat, high humidity, or vigorous exertion under the sun, the body may not be able to dissipate the heat and the body temperature rises, sometimes up to 106 degrees Fahrenheit or higher. Another cause of heat stroke is dehydration. A dehydrated person may not be able to sweat fast enough to dissipate heat, which causes the body temperature to rise.

Answer 3

The skin contains moisture even when not perspiring.
This moisture, as it's evaporating, heat is removed from the body for evaporation to take place. This heat is the Latent Heat of Vaporisation of water. This is 540calories of heat energy leaving your body for each gram of sweat evaporated.

When you're sweating, there's a lot of moisture evaporating, that's why you feel much cooler, even in the sun. When its breezy, the evaporation rate increases giving more cooling to the skin.

If you're dehydrated, the skin is very dry and there's insufficient moisture to carry out the cooling process of the body. The body temperature will rise and you can become quite ill. Sunstroke may also occur.

Answer 4

3

Answer 5

2

Answer 6

1

Answer 7

Body loses its capacity to sweat and thus the cooling provided by evaporation of sweat from the skin is reduced and leads to a rise in body temperature. Rehydration and sponging is the solution.

Answer 8

Many common natural remedies are claimed to have blood sugar lowering properties that make them useful for people with or at high risk of diabetes. Learn here https://tr.im/BupiZ

A number of clinical studies have been carried out in recent years that show potential links between herbal therapies and improved blood glucose control, which has led to an increase in people with diabetes using these more 'natural' ingredients to help manage their condition.

Answer 9

Look to the radiator in a car for your answer, and why the car heats up when the fluid level of it is low.

Answer 10

feeling hot makes you thirsty and therefore you drink to appease this physiological reaction and thereby restore the balance in the body