Vasoactive responses of terminal arterioles to acetylcholine (ACH, 10-4M), adenosine (ADO, 10-4M), nitroprusside (SNP, 10-4M), L-arginine (L-ARG, 10-4M) and phenylephrine (PE, 10-4M) before and after stress induced by (A) 2 minutes exposure to tissue wide NO (nitric oxide donor, SNP, 10-4M, n=35) or (B) 20 seconds exposure to 50 dC heat delivered via a 300 um Pt wire (thermocouple controlled, n=27). Responses in (B) were obtained within 500 um of the Pt wire. *differs from before; significance level p<0.05.