AP Biologyeasymcq1 pt
In endocrine signaling, a hormone reaches its target by
A.traveling through the bloodstream
B.diffusing only to adjacent cells
C.direct contact through gap junctions
D.synaptic gaps only
Explanation
Core Concept
Endocrine cells secrete hormones into the blood, which carries them to distant target cells bearing the matching receptor. Insulin and adrenaline work this way.
Correct Answer
Atraveling through the bloodstream
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