Explanation:
Hormone production and release are primarily controlled by negative feedback. In negative feedback systems, a stimulus causes the release of a substance whose effects then inhibit further release. In this way, the concentration of hormones in blood is maintained within a narrow range.
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Answer: Newton's 3rd Law of Motion - For every action, there is an equal but opposite reaction.
Explanation: Ex. Action - A book pushes down on a desk. Reaction - Desk pushes up on book.