Nsg 532 Cardiovascular Physiology Exam Questions (114 Terms) With Verified Definitions Updated 2024

AV node located {Ans: end of right atrium}+20 mV {Ans: atrial pacemaker cells' action potential}rapid repolarization {Ans: K+ channels open and K+ out of the cell}Atrial systole {Ans: P wave, SA node for atrial contraction}sarcoplasmic reticulum {Ans: store Ca2+, release & regulation of intracellular Ca2+}Epi/norepi- {Ans: HR}Ryanodine Ca2+ channel {Ans: sarcoplasmic reticulum stored Ca2+ release channel into sarcoplasm}Bundle of HIS location {Ans: septum}phase 1 {Ans: initial repolarization; K+ efflux}diffusion {Ans: most common movement in and out of the capillaries}Preload {Ans: EDV ~ 120 mL ventricular volume @ end of ventricular diastole}capillary bed location {Ans: capillaries and interstitial fluids}Purkinje fibers location {Ans: apex of the heart}wave of impulse {Ans: spreads upward toward from the apex}S1 {Ans: mitral & tricuspid valves close; pulmonic & aortic valves open; systole}Acetylcholine histamine bradykinin {Ans: relaxes smooth muscle}SV {Ans: ~70 mL; EDV - ESV; volume of blood pumped out of the heart in one beat}SERCA ATPase Ca2+ channel {Ans: Ca2+ uptake pump back into sarcoplasmic reticulum @ the end of contraction}ACE {Ans: converts angiotensin I to angiotensin II}epinephrine-adrenergic receptor {Ans: stimulate funny Na+ channels to open}