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1) As the body's chemical messengers, transfer information and instructions from one set of cells to another.
2) A is a group of cells that produces and secretes, or gives off, chemicals.
3) Hormones are released into the bloodstream via small tubes called.
4) Hormones find their way through the blood to their cells.
5) Each hormone is a differently shaped key that will only fit into the correct lock.
Answers: 3
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Which is not a characteristic of the animal kingdom? a. they include both vertebrates and invertebrates b. their skin is covered with hair or fur c. they are heterotrophs d. they are eukaryotic
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How can you tell the difference between rough er from smooth er?
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1) As the body's chemical messengers, transfer information and instructions from one set of cells t...
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