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Phlebotomy Essentials
6th Edition
ISBN: 9781451194524
Author: Ruth McCall, Cathee M. Tankersley MT(ASCP)
Publisher: JONES+BARTLETT PUBLISHERS, INC.
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What are 4 factors that may increase one's pulse rate?
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- Table 2: Resting and Exercising Cardiac Cycle Length, EDV, and ESV Resting Values Exercising Values Cardiac cycle length (msec) EDV(mL) ESV(mL) Cardiac cycle length (msec) EDV(mL) ESV(mL) Subject 1 839 136 68 452 138 35 Subject 2 831 145 73 392 142 33 Subject 3 855 141 68 414 140 35 Averages 000 Equations (fx) Use these formulas for making your calculations. Round your answer to the nearest tenth. Averages Add the values from the three subjects; divide by three. Your data will not be saved until the table is completely filled in. Table 3: Resting and Exercising HR, SV, and co Resting Values Exercising Values HR (strokes per min) SV (mL) SV(L) co (L/min) HR (strokes per min) sV (mL) SV(L) cO (L/min) Subject 1 Subject 2 Subject 3 Averages Equations (fx) Use these formulas for making your calculations. Round your answer to the nearest tenth. Averages Add the values from the three subjects; divide by three. Heart Rate HR = 60 (sec/min) x 1000 (msec/sec) /cardiac cycle length (msec); HR is…arrow_forwardWhat can a 6 lead ECG tell you?arrow_forward30. Early defibrillation is critical for individuals with sudden cardiac arrest for the following reasons EXCEPT: O A common initial rhythm in out-of-hospital witnessed sudden cardiac arrest is ventricular fibrillation (VF). The most effective treatment for ventricular fibrillation (VF) is electrical defibrillation. O Individuals in asystole respond well to early defibrillation. O The probability of successful defibrillation decreases quickly over time.arrow_forward
- Which of the following statements best describes the differences in the regulation of cardiac and skeletal muscle contraction? The amount of contractile force actively generated by muscle cells is increased by stretch in skeletal muscle and decreased by stretch in cardiac muscle. Cardiac muscle is stimulated by motor neurons and skeletal muscle by neurones from the autonomic nervous system. Skeletal muscle contractile force is augmented by increasing the firing frequency of action potentials whereas cardiac muscle contractile force is enhanced by noradrenaline increasing calcium influx through ion channels. Ryanodine receptors in skeletal muscle are opened by a mechanism that requires calcium influx whereas in cardiac muscle membrane depolarisation alone without calcium influx is sufficient to open ryanodine receptors.arrow_forwardExplain how the heart rate, pulse period and pulse amplitude changed with exercise and why?arrow_forwardExplain how to calculate your stroke volume and cardiac output.arrow_forward
- 16. The T-wave in the electrocardiogram above is caused by: repolarization of the ventricles, caused by K+ ions leaving ventricular muscle cells depolarization of the ventricles, caused by Na+ ions leaving ventricular muscle cells repolarization of the atria, caused by K+ ions leaving atrial muscle cells depolarization of the atria, caused by Na+ ions leaving atrial muscle cellsarrow_forwardGive the 2 reasons you are able to feel a pulse. When do you note the diastolic number?arrow_forward1. Determine cardiac output given a heart rate of 70 beats/min and a stroke volume of 0.1 L/beatarrow_forward
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