Which substance(s) act as pain-signaling molecules?

A) pheromones
B) morphine
C) endorphins
D) histamine and prostaglandins
E) dopamine

Signaling Molecules

Chemicals released by cells that communicate and coordinate actions across the body or between organisms, crucial in many biological processes.

Histamine

A compound released by cells in response to injury and in allergic and inflammatory reactions, causing contraction of smooth muscle and dilation of capillaries.

Prostaglandins

A group of physiologically active lipid compounds that have diverse hormone-like effects in animals.