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A: menthol (300 μM) caused a moderate contraction in pretensed, relaxed tail artery. B: when applied during electrical field stimulation of sympathetic nerves, menthol reduced the size of contractile responses. C and D: vessels precontracted with either KCl (60 mM) or penylephrine (2 μM) relaxed in the presence of menthol (300 μM) and icilin (50 μM), respectively. Scale bar in A applies to A–D.
