Explain negative feedback control using thyroid hormones as an example
What will be an ideal response?
ANSWER: Thyroid hormones (T3 & T4) are produced by the thyroid gland. Levels are maintained
within a physiological range. When theT3 and T4 levels drop due to metabolism, the
hypothalamus produces thyroid releasing hormone (TRH), which acts on the anterior
pituitary to produce thyroid stimulating hormone (TSH). TSH stimulates the thyroid to
produce and release T3 and T4. As the levels of T3 and T4 increase, the hypothalamus
decreases the production of TRH and thus TSH from the anterior pituitary also decreases.
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