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Biology 7 Online
OpenStudy (anonymous):

Which protein serves as a chemical messenger? A. Hemoglobin B. Actin C. Myosin D. Insulin

OpenStudy (abhisar):

Hi @thatman1 ! Our brain communicates with organs through two types of mechanisms. One is through the nervous system in which brain communicates with the organs with the help of electrical impulses and the other is through Hormonal system in which the brain communicates with the organs by releasing certain chemicals which act as messenger. Such chemicals are called as Hormones and their examples are Insulin, adrenaline, GnRH, FSH etc.

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