Chemicals that act as messengers are called

Name: Chemicals that act as messengers are called
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Question

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Hormones act as messengers between organs to cause release of needed secretions.Some,but not all,hormones are proteins.Enzymes work locally on specific classes of nutrients to change them from one form to a simpler form.Nerve impulses send messages in the body but via electrical impulses rather than via chemicals.

Chemicals That Act as Messengers Are Called