All are true regarding blood supply increase in muscle during exercise except
Ans. D. Inhibition of beta receptor.CHANGES IN MUSCLE BLOOD FLOW DURING EXERCISEThe blood flow of resting skeletal muscle is low (2-4 ml./100 g/min). The muscle blood flow can increase a maximum of about 25 fold during the most strenuous exercise.Amount of blood flow to skeletal muscles during exercise : 50 to 75 mL/min of blood per 100 g of muscle.Dilation of aerioles in skeletal muscles due to cholinergic sympathetic nerve activity and stimulation of beta-adrenergic receptors by the hormone epinephrine leads to increased blood supply.The local mechanisms maintaining a high blood flow in exercising muscle include a fall in tissue P02, a rise in tissue PCO2, and accumulation of K+, and other vasodilator metabolites. The rise in temperature fuher dilates the vessels.
Local metabolite
Sympathetic stimulation
Cholinergic stimulation
Inhibition of beta receptor