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Endocrine signals travel from endocrine cells to distant target cells. Compared with paracrine signals, what is a typical feature of the endocrine response?
AIt is faster to begin and produces a shorter-lasting effect
BIt travels only across a synaptic gap between two neurons
CIt is slower to begin but produces a longer-lasting effect
DIt never reaches cells outside the organ where it was made
Answer & Solution
Correct answer: C. It is slower to begin but produces a longer-lasting effect
1. Endocrine signals are carried by hormones through the bloodstream over long distances.
2. Because of this transport, endocrine signals usually produce a slower response but a longer lasting effect than paracrine signals.
3. A faster, shorter-lasting response instead describes paracrine signaling, which is the opposite pattern from the one described for endocrine signals.
4. Signaling across a synaptic gap describes paracrine signaling between nerve cells, not endocrine signaling.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 9 "Cell Communication", section 9.1 Signaling Molecules and Cellular Receptors_
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