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8 March, 22:13

Blood plays an important role in thermoregulation. Which of the following statements

about thermoregulation is NOT correct

A. Thermoregulation involves a balance between the production of heat and

the loss of heat.

B. The rate of heat loss is affected by the difference between temperature

of skin and external environment.

C. Internal conditions remain the same regardless of the external

conditions.

D. Heat loss from surface of the body is slower when the temperature

difference is higher.

E. Heat loss from the body deceases as more blood passes through the

skin.

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Answers (1)
  1. 8 March, 23:31
    0
    Answer: C and E options not correct.

    Explanation:

    Thermoregulation itself is actually a branch of homeostasis. Homeostasis is defined as the internal regulation of body environment which includes the vital organs of the body such as the heart, liver, brain and contraction of skeletal muscles.

    However, there are four routes of heat lost in the body. They are through convection, conduction, radiation, and evaporation. If skin temperature is greater than that of the surroundings, the body can lose heat by radiation and conduction. But, if the temperature of the surroundings is greater than that of the skin, the body actually gains heat by radiation and conduction. In such conditions, the only means by which the body can rid itself of heat is by evaporation. So, when the surrounding temperature is higher than the skin temperature, anything that prevents adequate evaporation will cause the internal body temperature to rise. Even during sports activities, evaporation becomes the main avenue of heat loss. Humidity itself, affects thermoregulation by limiting sweat evaporation and thus heat loss.
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