Thermoregulation Flashcards
normal range of body temperature is considered to be
36.2° to 37.7° C
96.2° to 99.4° F
What mechanisms are in place to regulate temperature?
The hypothalamus, and endocrine system. Peripheral thermoreceptors
Where are these located?
Skin, liver, skeletal muscles. Central thermoreceptors in hypothalamus, spial cord, viscera, and great veins
Where are these located that regulate temperature?
Skin, liver, skeletal muscles. Central thermoreceptors in hypothalamus, spial cord, viscera, and great veins
Heat produced as by
chemical reaction metabolism, skeletal muscle contraction and thermogenesis by raising basal metabolic rate
Heat loss
Radiation, conduction, convection, vasodilation, evaporation, decrease muscle tone, increase respiration, voluntary mechanisms, adaptation to warmer climate
Hypothermia temp
below <35 C
below <95 degree F
What can happen with severe Hypothermia?.
if severe, ice crystals can develop inside the cells causing cellular rupture and death.
When would you use a therapeutic hypothermia
short term in OR or after cardiac arrest to preserve tissue from ischemia (an inadequate blood supply to an organ or part of the body, especially the heart muscles.)
When would a fever be beneficial
temporary hypothalamic reset of temp
Hyperthermia Temp
40 or 41° C
104 -105.8° F
nerve damage can produce convulsions in the adult due to
Hyperthermia
Death results at what temp
43° C
109.4° F
Fever temp
> 38.3 C
99.5-100.9 F
Mechanisms of Heat Production
Description:
Occur during ingestion and metabolism of food and while maintaining body at rest (basal metabolism); occur in body core (e.g., liver)
Condition:
Chemical reactions of metabolism
Mechanisms of Heat Production
Description:
Gradual increase in muscle tone or rapid muscle oscillations (shivering)
Condition:
Skeletal muscle contraction
