3) which of the following is the correct sequence of events during ventricular systole? 1- AV valves close 2- blood is ejected into the pulmonary trunk and aorta 3- semilunar valves open 4- ventricles begin to relax and enter into ventricular diastole 5- ventricles begin to contract and blood pressure in ventricles increase   A) 4,2,3,1,5 B) 4,1,3,5,2 C) 5,1,3,2,4 D) 5,2,3,1,4

Increasing the diameter of the right flow tube simulates which of the following (A) vasodilation (B) decrease in systemic vascular resistance (C) increase in ventricular contractility (D) A and B (E) none of the above

72. A 42-year-old man undergoes angioplasty to open an atherosclerotic blockage at the origin of the circumflex artery A balloon catheter is introduced in the femoral artery at the femoral triangle. Which of the following is the most likely sequence of structures traversed by the catheter during this procedure? O A) Common iliac artery-aorta right coronary artery O B) Common iliac artery-pulmonary trunk left coronary artery C) External iliac artery-aorta-left coronary artery OD) External iliac artery-pulmonary trunk-left coronary artery E) Internal iliac artery aorta left coronary artery OF) Internal iliac artery aorta right coronary artery

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What condition(s) does increasing the diameter of the left flow tube simulate in the human heart (A) increasing afterload (B) increasing preload (C) increasing viscosity of the blood (D) increasing the contractility of the ventricles

1) Which of the events below occurs when the semilunar valves are open? A) Ventricles are in diastole. B) Blood leaves pulmonary arteries and the aorta. CAV valves are closed. D) Both A & B E.) None of the above

1a) Exercise immediately increases end-diastolic volume.True/False b)Mean arterial pressure is a relevant stimulus for the baroreceptor reflex.True/False c)Which of the following would be the most relevant efferent pathway for the regulation of cardiac output by the hormone epinephrine. (baroreceptor, axon, blood, ventricular cells, AV node, brainstem)

4) A) Calculate the Systolic Pressure of a 65 years old man if the diastolic blood pressure is 90 mmHg and stroke volume of 70 ml/beat. Total Peripheral Resistance is 19mmHg.min/L. Assume person is healthy and has a normal heart rate. B) Calculate Left ventricular end-diastolic volume (LVEDV) when the mean ejection fraction is 80 % ?

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Which heart activity correlated with the hi-lighted portion of the EKG in this image? A)ventricle depolarization B) repolarization C) right heart depolarization D) atrial depolarization