Homeostasis - IGCSE Biology
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Humans maintain a constant internal environment through mechanisms like fat insulation and the hypothalamus regulating body temperature at 37 degrees centigrade. Negative feedback systems like thermoregulation and blood glucose control minimize fluctuations in parameters for optimal functioning.
Insights
- Humans maintain a stable internal environment through homeostasis, which involves regulating body temperature at 37 degrees centigrade using mechanisms like fat insulation, skin temperature receptors, and the hypothalamus as a thermostat.
- The hypothalamus coordinates various responses like sweating, shivering, vasodilation, vasoconstriction, and metabolic changes to adjust body temperature, demonstrating how negative feedback systems like thermoregulation work to minimize fluctuations and maintain optimal conditions for bodily functions.
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Recent questions
How does the body regulate temperature?
Through mechanisms like fat insulation and sweating.
What is homeostasis?
Maintenance of a constant internal environment.
What is the role of the hypothalamus in temperature regulation?
Acts as a thermostat triggering responses to regulate temperature.
How do negative feedback mechanisms help in temperature regulation?
Minimize fluctuations in body temperature.
What are some responses triggered by the hypothalamus to regulate body temperature?
Hair lying flat, sweating, and shivering.
Related videos
Summary
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Regulating Body Temperature Through Negative Feedback
- Homeostasis is the maintenance of a constant internal environment, with humans regulating body temperature at 37 degrees centigrade through various mechanisms like fat insulation, temperature receptors in the skin, and the hypothalamus acting as a thermostat.
- The hypothalamus triggers responses like hair lying flat or standing erect, vasodilation, sweating, metabolism changes, vasoconstriction, and shivering to regulate body temperature through negative feedback mechanisms.
- Negative feedback systems, such as thermoregulation and blood glucose control, ensure that any fluctuations in parameters like body temperature or blood glucose levels are minimized and brought back to their normal range for optimal functioning.
