Regulation of Body Temperature – Thermoregulation (Grade 12 NSC Matric Life Sciences): Flashcards
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Thermoregulation definition
Thermoregulation definition
Process body controls internal core temperature
Endothermic organisms
Endothermic organisms
Organisms maintaining constant body temperature internally
Normal human body temperature
Normal human body temperature
Approximately 36.8°C
Effect of temperature above 37.5°C
Effect of temperature above 37.5°C
Enzymes become denatured (lose shape, stop working)
What Ruffini's corpuscles detect
What Ruffini's corpuscles detect
Heat
What Krause's end bulbs detect
What Krause's end bulbs detect
Cold
Hypothalamus role in thermoregulation
Hypothalamus role in thermoregulation
Temperature control centre in the brain
Vasodilation (hot conditions)
Vasodilation (hot conditions)
Blood vessels near skin surface widen/dilate
Vasoconstriction (cold conditions)
Vasoconstriction (cold conditions)
Blood vessels near skin surface narrow
Purpose of shivering
Purpose of shivering
Generates heat through involuntary muscle contractions