Hormones differ from other chemical messengers such as neurotransmitters in that hormones:

A) travel through the bloodstream.
B) are all in the lipid chemical family.
C) always suppress rather than stimulate a response.
D) are released through ducts.
E) cross a synapse.


Answer: A

Biology & Microbiology

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Indicate whether the statement is true or false

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Which is a characteristic of ribbon worms and flatworms?

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