Hamad Cardiovascular system 03/01/2022 A. 1 to 4 m/sec B. 5 to 8 m/sec C. 9 to 12 m/sec D. More than 12 m/sec Related Mcqs: Normally, the rate of the heart beat in a human is determined by _________________?A. The bundle of His B. All cardiac muscle C. The sinoatrial node D. The cervical ganglion... First heart sound occurs during the period of________________?A. Isotonic relaxation B. Isovolumetric relaxation C. Isovolumetric contraction D. Isotonic contraction... The dicrotic notch on the aortic pressure curve is caused by_________________?A. Closure of the pulmonary valve B. Rapid filling of the left ventricle C. Closure of the aortic valve D. Contraction of the atria... Parasympathetic stimulation of heart causes______________?A. SA node decreases firing B. Increased AV node excitability C. Decreased ventricular contraction D. Tachycardia... Cardiac cycle duration in man is_______________?A. 0.4 seconds B. 0.8 seconds C. 1.2 seconds D. 1.6 seconds...
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