The relationship between the insect hormones ecdysteroid and PTTH is an example of ________.
A) an interaction of the endocrine and nervous systems
B) competitive inhibition of a hormone receptor
C) how polypeptide-derived hormones have more widespread effects than steroid hormones
D) homeostasis maintained by antagonistic hormones

Question

Quizplus · Accepted Answer

The insect hormones ecdysteroid and PTTH have a complex relationship where PTTH stimulates the production of ecdysteroid, which in turn causes molting and metamorphosis. This relationship involves both the endocrine and nervous systems, as PTTH is produced in neurosecretory cells in the brain and transported via nerves to the prothoracic glands, where ecdysteroid is produced.

The Relationship Between the Insect Hormones Ecdysteroid and PTTH Is