This quiz will take you through the control and effects of thyroid hormones.

Here's how it's organized:

This space will give you concept maps and feedback on your answers.

<-- Main navigation buttons are to the left.

Buttons to answer questions or choose options are to the right -->

And the questions you are supposed to answer appear in the bar below.

You can quit anytime, just by closing your browser. Use your browser's 'Back' button to back up any time you want to look at a screen again. If you came here from another tutorial, use the 'Back to tutorial' button to return to it.