5. Hormones released into the bloodstream are exposed to numerous tissue types in the body but often only cause effects in a few. Why?
Hormones released into the bloodstream are exposed to numerous tissue types in the body but often only cause effects in a few. This is because there are certain protein receptors that are present on the target cells (the cells on which the effects of the Hormone are to be made) which binds with only the specific hormons as they are hormone specific as each hormone has its own receptor.
When these hormones bind to their receptors then they transmit their chemical signals to the targetted cell or tissue.only.
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