The relationship between the insect hormones ecdysone and PTTH
A)is an example of the interaction between the endocrine and nervous systems.
B)illustrates homeostasis achieved by positive feedback.
C)demonstrates that peptide-derived hormones have more widespread effects than steroid hormones.
D)illustrates homeostasis maintained by antagonistic hormones.
E)demonstrates competitive inhibition for the hormone receptor.

Question

Quizplus · Accepted Answer

Ecdysone and PTTH (prothoracicotropic hormone) illustrate the interaction between the endocrine and nervous systems, as PTTH is a neurohormone that stimulates the release of ecdysone, a steroid hormone, from the prothoracic glands.

The Relationship Between the Insect Hormones Ecdysone and PTTH