Movement and messages

Connect movement, sensory signals, immune response and DNA information.

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1. 1

   Why do different joints allow different movements?

   Compare a hinge with a ball-and-socket connection.

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2. 2

   How can a pair of muscles move a joint both ways?

   Use opposing pulls to bend and straighten a virtual arm.

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3. 3

   How does a stimulus become information?

   Trace a sensory signal from a receptor toward the nervous system.

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4. 4

   How do different defences work together?

   Compare barriers, general responses, specific recognition and memory.

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5. 5

   How does DNA pairing help preserve information?

   Build an aligned complementary strand and compare the bases.

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Each discovery includes all five reading levels. Journey progress reflects the checkpoints answered on this browser.

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