Which regulatory molecule cannot enter its target cell?
A)epinephrine
B)acetylcholine
C)nitric oxide
D)epinephrine AND acetylcholine

Name: Which regulatory molecule cannot enter its target cell? A)epinephrine B)acetylcholine C)nitric oxide D)epinephrine AND acetylcholine
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Question

Quizplus · Accepted Answer

Epinephrine and acetylcholine cannot enter their target cells; instead, they bind to receptors on the cell surface to exert their effects. Nitric oxide, however, can diffuse directly into cells.

Which Regulatory Molecule Cannot Enter Its Target Cell