Question: According To The Frank Starling Law, When The Heart Receives A Greater Blood Volume (A) It Will Pump Weakly To Continue To Produce The Original Stroke Volume, (B) It Will Pump At The Original Strength To Increase Stroke Volume. (C) It Will Increase The Strength Of The Pump And Increase Stroke Volume, (D) None Of The Above, The Heart Can Not Suddenly …

According to the Frank Starling law, when the heart receives a greater blood volume (A) it will pump weakly to continue to produce the original stroke volume, (B) it will pump at the original strength to increase stroke volume. (C) it will increase the strength of the pump and increase stroke volume, (D) none of the above, the heart can not suddenly receive a greater blood volume. 32. Insert typical, healthy approximate values for the following characteristics (assume – 150 lb, 25 y.) include units Stroke Volume соусі. COM Blood Volume HR Heart Raterest BO 21. Debel the deviations on the IC below and place the following labels the letters met appropriate locations along the ECG (show whether the following items are at a por over a rango) (A)dup (2 heart sound). (B)active ventricular filling (C) Hovolumetrie ventricular contraction, (D) the opening of semilunar valves (E) the closing of semilunar valves If scar tissue blocks the electrical conduction between the sinoatrial node and atrioventricular node, the ventricles will: (A) contract at a faster rate than the atria, (B) contract in synchrony with the atria, (C) contract less frequently than the atria, (D) will not contract, High systemic levels of epinephrine will: (list all that apply) (A) increase end diastolic volume (B) decrease heart contractility. (C) increase heart contractility (D) decrease heart rate, (E) increase heart rate ✓ lated discs, mat mir of cardiac muscle? (C) it is strated FH If the pulmonary valve in the heart was damaged och fled to close property (A) blood would accumulate in the left ventricle. (B) there would be back flow of blood into the right ventricle, the blood pressure of the wort would be increased blood pressure would increase in the lungs. (E) the left side of the heart would enlarge The action potential of contractile cardiac muscle fibers lasts approximately as long as (A) a skeletal muscle fiber’s action potential (B) contractile cardiac muscle fiber contraction (©) a neuron’s action potential (D) all of the above, (E) none of the above. Approximately what percentage of cardiac muscle fibers can produce their own action potentials, i.e., are autorhythmic fibers? (A) 100% (B) 50% (C) 10% (D) 19. (E) none of the above, no cardiac muscle fibers are autorhythmic. Starting from a point within the femoral (leg) vein, a red blood cell will travel through the following vessels and chambers, in what order? (A) right atrium, (B) aorta (C) left ventricle. (D) pulmonary artery. (E) inferior vena cava 16 The sinoatrial node, without external stimuli, will fire at a rate of approximately 2 beats per minute. (A) 120. (B) 100, (C)60-80 (D) 40, (E) 0, there is no beating without external stimuli Place the following electrical conducting tissues of the heart in the correct order A) atrioventricular node, (B) Purkinje fibers, (C) bundle branches, (D) bundle of His (E) sinoatrial node 18 True or False. The valve between the inferior and superior venae cavae and the atrium closes during atrial contraction be a normal functioning heart the atria contract the ventricles contract. A) at a faster rate than (B) at a slower rate than, (C) at the same frequency as, (D) at a rate unassociated with the rate at which, (E) at the same time as. 20. With regard to the heart sounds, the “lubb” (Ist sound) is produced by the A , and the “dup” (2nd sound) is produced by the (A) closing of the atrioventricular valves, (B) opening of the pulmonary ad aortic valves, (C) closing of pulmonary and aortic valves, (D) stretching of the elastic arteries, (E) contraction of the ventricles. 21. Dabel the deviations on the ECG below and place the following labels (the letters) at their appropriate locations along the ECG (show whether the following “items” are at a pt. or over a range). (A) dup (20d heart sound). (B) active ventricular filling (C) isovolumetric (ventricular) contraction, (D) the opening of semilunar valves, (E) the closing of semilunar valves