Which Is the Initial Step of the Negative Feedback Regulation

question 12

Multiple Choice

Which is the initial step of the negative feedback regulation that results in the suppression of secretion of TSH and TRH thyroid hormone?

• A) Blood levels of thyroid hormone rise.
• B) Hypothalamus secretes thyroid-releasing hormone (TRH).
• C) T3 and T4 are secreted.
• D) The anterior pituitary secretes thyroid-stimulating hormone (TSH).

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Definitions:

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Feudalism is a medieval social system where land was held by nobles in exchange for military service, and peasants lived on their lord's land, offering labor or a share of the produce as rent.

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