Diagram shows....contraction of a blood vessel segment in response to in
vitro administration of norepinephrine (NE) before and after drug X is given
. After the drug X is given the action of NE is increased (contraction
increased).
what is drug X 'sounds very mystiful' ?
a) cocaine
c) isoproterenol (the ans selected)
d) metoprolol
e)phenoxybenzamine
f)reserpine
g)tyramine
