<prompt> The main cause of increased blood How to exercising muscles is:Raised blood pressureVasodilatation due to local metabolitesIncreased sympathetic discharge to peripheral vesselsIncreased heart rate  <response>: Ans. b Vasodilatation due to local metabolitesRef: Guyton, 13th edp.1093In exercising muscle, there is accumulation of local metabolites leading to vasodilation - This increases blood flow. 