Hormones are chemical
messengers that send information to all the cells in our body.
Hormones transmit their chemical signals by diffusion over longer
distances, and to potentially more cells, than the chemical signals
Hormones coordinate the body's
internal activities, from maintaining homeostasis to timing the
events of complex processes like reproduction and development.
Important cues from the
environment, such as day length and temperature, can be translated
into hormonal signals that help organisms respond appropriately to
In this Lesson, well
investigate the advantages of broadcasting chemical signals
throughout the body, as we explore the characteristics and
mechanisms of hormone action. We'll finish by doing an experiment to
investigate the role of hormones in insects.