Chrome File Edit View History Bookmarks People Window Help Your e Gift Card x C Biology question chegg.com x & choose the accurate stateme x O DM Unit 6 Workbook C O ezto.mheducation.com Human Physiology BIOL 1051H-W: Web ANATOMY & PHYSIOLOGY Unit 6 Workbook Question 27 (of 28) 27 value 3.00 points How is increased muscle perfusion during exercise accomplished? Check all that apply. How is increased muscle perfusion during exercise accomplished? Check all that apply. Arterioles dilate in response to epinephrine and norepinephrine. Precapillary sphincters dilate in response to muscle metabolites such as lactic acid, CO2 and adenosine. Muscular contraction compresses the blood vessels. Precapillary sphincters constrict in response to muscle metabolites such as lactic acid, co2, and adenosine. Blood is diverted from other organs such as the digestive tract and kidneys to meet the needs of the working muscles. References eBook & Resources Check All That Apply How is increased muscle perfusion during Section: 20.05 exercise accomplished? Check all that apply 64 Wed 1:25 PM Talia LaForest instructions I help Save & Exit Submit You did not receive full credit for this question in a previous attempt
Answer is
precapillary sphincters dialate in response to muscle metabolites such as lactic acid, Co2, and adenosine
Arterioles dialate in response to epinephrine and norepinephrine.
During increased muscular activity, blood flow through tissues is very necessary to meet the oxygen requirement of body. The rate of blood flow is 15 to 20 times higher during exersise as compared to resting stage.
During increased exersise, vasodiation metabolites such as lactic acid, CO2, potassium ions and adenosine are released causing dialation of precapillary sphincters at the same time release of epinephrine and norepinephrine cause dialation of skeletal muscle blood arterioles so that maximum blood flows through to supply maximum oxygen to the tissue during exersise.
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