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Stable body temperature - Coggle Diagram
Stable body temperature
Stimuli Detected by thermoreceptors (internal and external)
Information processed by the hypothalamus
Body temperature is too high
Activate heat-loss centre
Sweat glands activate
Sweat evaporates
Heat loss increases
Body temperature drops
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Body dissipates less than it produces/absorbs
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Smooth muscles relax
Vasodilation occurs allowing blood close to the skin surface
Body temperature is too low
Activate heat-promotion centre
Skeletal muscles contracted rapidly (shivering)
Smooth muscles contract
Vasoconstriction occurs diverting blood away from the skin
Hypothalamus releases TRH
Anterior pituitary releases TSH
Thyroid releases thyroxine (T4)
Metabolism/cellular respiration increases
Heat production increases
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T4 inhibits TSH and TRH production
Arrector pili muscles contract
Skin hair rises
An insulative layer of air is created
Heat loss is decreased
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