'Signal Transduction' or 'Signaling' is the process by which biological information is transferred. Signaling happens at multiple levels, from interactions between species in ecological systems to interactions between molecules inside a cell.

In this lesson, we will look at signal transduction in animals at the organismal and the cellular levels. In the whole animal, signal transduction controls growth, development, metabolism and behavior. In individual cells, signal transduction is crucial for decisions about essential processes such as cell division and metabolic control. In fact, many diseases are caused by the malfunction of cellular signaling processes.

Are you ready for this lesson?

To use this lesson, you should have:

• Read the pages covering signal transduction in your text;
• reviewed your lecture notes on signal transduction;
• an understanding of molecular and cellular concepts learned in Biology 151.

Lesson Topics