Question

Hormone ecdysone is produced by

• A. Corpora allata
• B. Prothoracic glands
• C. Corpora cardiaca
• D. Intercerebral gland cells

Answer 1

The correct option is B Prothoracic glands

Ecdysone is a steroidal prohormone of the major insect molting hormone 20-hydroxyecdysone, which is secreted from the prothoracic glands. The steroid ecdysone secreted from the Y-organ stimulates molting. After it is released into the blood, ecdysone is converted to a 20-hydroxyecdysone, which is the active molting hormone. Secretion of ecdysone is blocked by a neurohormone called molt-inhibiting hormone, produced by the eyestalk complex.

So the correct answer is 'Prothoracic glands'.