Which of the following statement about Homeostasis is incorrect?
Correct answer: B. Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment
- A. There is a definite control system that regulates the homeostatic activities
- B. Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment
- C. Because of this the fluctuations of internal environment are of extremely narrow range as compared to that of external environment
- D. All are correct
Explanation
Homeostasis does not keep the internal environment completely fixed; it maintains variables within a narrow range despite external changes. Therefore statement b is incorrect, while students may choose d by overlooking the word fixed and treating all three statements as accurate.
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About Thermoregulation
Thermoregulation maintains body temperature through negative feedback controlled mainly by the hypothalamus. It covers vasodilation and vasoconstriction, sweating, shivering, changes in metabolic heat production and behavioural responses, while distinguishing heat loss by radiation, conduction, convection and evaporation from temperature regulation itself.
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