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In this activity about the baroreceptor reflex (BR) arc (page 123 of the PDF), learners discover the importance of maintaining adequate arterial blood pressure through a role playing exercise.

In this activity, learners estimate risks associated with different events and compare their estimates to the real possibilities.

If you had a long tube with a 5 millimeter wide slit, would you see the entire Golden Gate Bridge?

Create 3D glasses and use them to explore color, light and optics. Fool your brain into 'seeing' three dimensions on a flat surface!

This activity (9th activity on the page) about hearing demonstrates to learners the importance of having two ears.

In this activity, learners play a simple card game to learn the sequence of events in the transmission of nervous system signals.

In this activity (12th on the page), learners investigate their ability to discriminate (see) different colors.

In this activity, learners investigate visual perception as well as plan and conduct their own experiments.

In this activity (page 105 of the PDF), learners measure heart rate and blood pressure and learn how to obtain consistent measurements during repeated tests.