Chemical messengers are sent through the body from one type of cell to another, via the bloodstream, to give permissions, change processes, or warn of danger. See if you can identify at least 5 different types of messages and understand why they are important in controlling things such as growth, blood sugar level, and how fast you can run in an emergency.

About Instructor

dr-rob

44 Journeys

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Journey Includes

  • 5 LEARN It! Challenges