The reason that some individual hormones have so many different effects is that

a. they influence gene transcription.
b. they trigger a second messenger system that produces a cascade of effects.
c. there are a great many different cells in different tissues that have specific receptors for the
hormone.
d. the hormone is carried throughout the body and only a small amount is needed to produce
its effect.
e. they are realeased in different concentrations.


C

Biology & Microbiology

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