<prompt> All are true about circulating changes in exercising muscle EXCEPT?Complete flow stops on maximal tension reaching 70Blood supply increases by 30 times between contractionsDilation of arterioles and pre-capillariesPeripheral resistance increases  <response>: Ans. D Peripheral resistance increasesRef: Ganongy 25th ed. pg. 549 Blood flow of resting skeletal muscle is low 2-4 ml100 gmmin When the muscle contracts, it compresses the vessels and when it develops 70 of its maximal tension, blood is completely interrupted. Between contractions the flow is increased by 30 times This is due to dilatation of arterioles and precapillary sphincters cause of 10-100 times increase in open capillaries During exercise there is a net fall in peripheral resistance, due to vasodilation in exercising muscles. Hence the SBP increases moderately and diastolic pressure remains unchanged or falls. 