In most vessels, epinephrine and norepinephrine cause ______ but in skeletal and cardiac muscle, these hormones cause ____________.
A. vasoconstriction; vasodilatation
B. vasodilatation; vasoconstriction
C. increases to blood flow; decreases to blood flow
D. increases in oxygen concentration; decreases in oxygen concentration
E. both C and B
Ans: A. vasoconstriction; vasodilatation
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