Which feedback inhibition regulates circulating ecdysone concentrations during a larval insect molt?

💡 Explanation

When ecdysone concentrations rise, negative feedback reduces PTTH (prothoracicotropic hormone) release from the corpora cardiaca because PTTH stimulates ecdysone synthesis. Therefore, decreased PTTH results, rather than alternative hormonal regulation, which involves different glands and separate signaling mechanisms.

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