alleryStart learning →A hormone affects the activity only of cells that carry the matching:
AReceptors
BRectangles
CReflectors
DRefractors
Answer & Solution
Correct answer: A. Receptors
1. A hormone travels everywhere the blood goes.
2. Most of the cells it passes ignore it completely.
3. It affects only its target cells, meaning cells with receptors for it.
4. So the matching receptor decides who responds.
_Source: OpenStax Anatomy and Physiology 2e (CC BY 4.0), Ch 17 'The Endocrine System', sections 17.1-17.9_
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