CV 2

ajkim1's version from 2015-05-30 02:54


Question Answer
IsovolumetricAll valves are closed and ventricular volume is constant
Atrial systoleA wave on venous pulse curve
First heart soundAV valve closure
Rapid ventricular ejectionMaximum ventricular pressure
Second heart soundSemilunar valve closure
Third heart soundRapid flow of blood from atria into ventricles
Longest phase of cardiac cycleReduced ventricular filling
Ideal mechanisms for regulating arterial pressureFast, neurally mediated baroreceptor mechanism and a slower, hormonally regulated renin-angiotensin-aldosterone mechanism
Baroreceptor reflexNegative feedback system responsible for constant regulation of arterial blood pressure
BaroreceptorsStretch receptors within walls of carotid sinus near bifurcation of the common carotid arteries
What induces the greatest response from baroreceptors?Decrease in arterial pressure
Set point for mean arterial pressure100 mmHg
Cushing reactionResponse to cerebral ischemia
Starling equationFluid exchange across capillaries
Jv positiveNet fluid movement out of the capillary- filtration
Jv negativeNet fluid movement into the capillary- absorption
Organs that exhibit autoregulationHeart, brain, kidney
Histamine and bradykinin cause arteriolar _____ and venous _____Dilation; constriction
SerotoninCauses arteriolar constriction and is released in response to blood vessel damage to prevent blood loss