When the output of a pathway inhibits inputs to the pathway. This condition is known as
A
Positive feedback
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B
Negative feedback
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C
Both A and B
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D
None of the above
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Solution
The correct option is B Negative feedback An increased amount of thyroxine in the blood exerts an inhibitory effect on the hypothalamus. in such a way that less of thyroid releasing hormone (TRH) and thyroid stimulating hormone (TSH) is produced respectively. This eventually results in a decrease in thyroxine. This is called negative feedback control.