MSF Exam 2 Practice TEST QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE 2023

MSF Exam 2 Practice TEST QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE 2023 C. 93 mmHg MAP = diastolic + 1/3(systolic - diastolic) MAP = 80 + 1/3(120 - 80) = 80 + 1/3(40) = 80 + 13.3 = 93 A patient's blood pressure is 120/80, what is mean arterial pressure? A. 40 mmHg B. 120 mmHg C. 93 mmHg D. 133 mmHg C. decrease RR interval on ECG Heart rate would increase due to sympathetic outflow. Faster heart rate reduces the RR interval Sympathetic outflow to the heart would: A. activate K+ outflow from SA node B. cause a decrease in stroke volume C. decrease RR interval on ECG D. Increase RR interval on ECG A. increased venous return; increased SV Decreased venous capacitance or compliance would cause which of the following: A. increased venous return; increased SV B. decreased venous return; decreased volume C. increased venous return; decreased mean arterial pressure D. increased right atrial pressure; decreased mean arterial pressure B. atrial depolarization; atrial contraction P waves are indicative of _______ and result in ______ A. atrial depolarization; ventricular contraction B. atrial depolarization; atrial contraction C. ventricular depolarization; ventricular contraction D. ventricular contraction; ventricular repolarization C. increase in cardiac output; increase in mean arterial pressure Normal CO is ~5 L/min FYI Increases in SV would cause which of the following? A. increase in venous capacitance; increase in right atrial pressure B. increase in cardiac output; increase in contractility C. increase in cardiac output; increase in mean arterial pressure D. increase in cardiac output; decrease in mean arterial pressure A. activation of a muscarinic receptor Parasympathetic stimulation would cause which of the following? A. activation of a muscarinic receptor B. activation of a Beta-2 adrenergic receptor C. activation of a Beta-1 adrenergic receptor D. activation of an alpha-1 adrenergic receptor TPR = (MAP - CVP) / CO MAP = diastolic + 1/3(systolic-diastolic) MAP = 80 + 1/3(120-80) = 93 mmHg TPR = (93mmHg - 4mmHg) / 5L/min = 17.9 mmHg x min x L^-1 Blood pressure = 120/80 CO = 5 L/min central venous pressure = 4 mmHg What is TPR? D. K+ efflux in a myocardial contractile cell What is happening at C? A. Na+ efflux in a myocardial contractile cell B. Ca++ influx in an autorhythmic cell C. K+ efflux in the SA node D. K+ efflux in a myocardial contractile cell B A patient with heart failure is given a positive inotropic drug. Which letter on the graph represents this patient? MAP = 85 + 1/3(130-85) MAP = 100 mmHg Blood pressure measurement of a patient is 130/85. What is the MAP? CO = SV x HR CO = 6375 mL/min or 6.4 L/min A patient has a HR of 85 BPM and a SV of 75 mL/beat (determined via ECG). What is the cardiac output? MAP = diastolic + 1/3(systolic - diastolic) TPR = MAP / CO MAP = 75 + 1/3(117-75) = 89 mmHg TPR = 89 / 4.5 = 19.8 mmHg x min x L^-1 Blood pressure = 117/75 CO = 4.5 L/min What is MAP? What is TPR? C. Arterioles Which of these vessels has smooth muscle, carries oxygenated blood to the body, has a mean pressure of ~50 mV, is where the largest pressure drop in circulation occurs, has alpha-1 and beta-2 receptors for vasoconstriction/vasodilation, and houses the precapillary sphincter? A. Arteries B. Venules C. Arterioles D. Venous sinus B. Because they have a massive cross-sectional area - this allows for gas exchange Why do the capillaries have the slowest velocity of blood? A. Because they are the smallest B. Because they have a massive cross-sectional area C. Because they have a low O2 content D. Because they have a lot of smooth muscle delta Pressure = MAP aorta - R arterial pressure Flow rate (Q) = delta pressure / TPR Velocity of blood flow (v) = Q / area Delta pressure = 110 - 70 = 40 mmHg Flow rate = 40 / 18 = 2.22 Velocity = 2.22 / 3 = 0.74 The blood flow velocity and area are inversely proportional. As the area of vessel increases, t