Which regulatory molecule cannot enter its target cell?
A) epinephrine
B) acetylcholine
C) nitric oxide
D) Both epinephrine and acetylcholine are correct.
Correct Answer:
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Q106: Which of the following is NOT a
Q107: Which G-protein subunit binds GDP?
A)alpha subunit
B)beta subunit
C)gamma
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Q118: The Na+/K+ pump
A)establishes equilibrium concentrations of sodium
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