Control of blood flow

the high compliance of the aorta allows it to stretch during ______

systole

the elastic recoil of the aorta propels blood forward during ______: thus a continual supply of blood is delivered to tissue

diastole

The_____ in the walls of the aorta and large arteries absorb energy during systole and re-deliver a portion of it back to the column of blood

elastic fibers

Pulse waves are conducted along vessels at a higher/lower velocity than blood flow

higher

Velocity of conduction increases with …?

increasing stiffness of vessel wall

Amplitude of pulse wave is greater with …?

stiffer walls

how is blood pressure neurally regulated?

reflex pathways

how can reflex pathways affect/regulate blood pressure?

• cardiac output by changing heart rate and stroke volume

• constriction of small muscular arteries and arterioles to increase TPR and therefore blood pressure

• changes in capacitance of veins (constriction) to increase venous return (preload) to increase strength of contraction (Frank-Starling Law)

describe the negative feedback system involving baroreceptors that controls blood pressure.