Chemical messengers released within the tissues where they are produced

Hormones are called chemical messenger of the body, which occur in various tissues where they are produce. They occur in response to specific biochemical signals from a wide range of regulatory systems and behavioral activities that is vital in the communication between organs and tissues. Moreover, hormones create a cellular response by binding to cell membrane or intercellular receptors.

the growth of the plants is affected by the heat of the light. what is the student doing?

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