Identical twins ride bicycles side by side reaching the top of a hill at the same time. One is taking drugs that block the beta-receptors. None of the above. Following administration of an experimental drug, a patient experiences an episode of marked and sustained increase in total peripheral resistance with no change in venous return, heart rate or contractility. No change in left ventricular end systolic pressure 9.
Stroke volume is the volume of blood each ventricle of the heart ejects per beat.
Arterioles are resistance vessels, veins are considered highly elastic when not completely filled and the greatest cross-sectional area of the microvascular system resides in the capillaries. Arterioles are resistance vessels, capillaries are the most narrow vessels of the microvascular system but the capillaries contain the greatest fraction of blood volume of any of the components of the microvascular system. Arterioles are resistance vessels, veins are highly compliant when filled and capillaries are the most narrow diameter vessels of the microvascular system. Meta-arterioles are resistance vessels, veins are a capacitance system and the vena cava is the widest diameter vessel. III are large positive.