3. Research the condition situs inversus (also known oppositus or situs transversus). This condition is found in approximately 0.01% of the population. Which lead configuration would produce the largest R wave in a subject with this condition? What would be the most likely axis of the heart for a subject with this condition?

The heartbeat includes: a. the systole when the heart relaxes and fills. b. the diastole when the heart contracts and empties. c. pressure that causes the AV valves to open, filling the ventricles. d. rising pressure in the ventricles to open the AV valves and close the SL valves. e. the lub sound when the SL valves open and the dub sound when the AV valves close.

1 poi Which of the following best describes diastole? The atria contract which force the atrioventricular valves to close The ventricles contract forcing blood to leave the heart and the atrioventricular valves close The ventricles relax and re-fill with blood and the atrioventricular valves open Both atria and ventricles contract at the same time and all valves are open What is NOT the function of hemoglobin in red blood cells? Delivers CO2 from the body cells Binds and delivers 02 to body cells Involved in blood clotting Involved in fighting off bacteria and viruses H IA 1 point

14. Assume that a string is tied around the heart at the level shown in thediagram by the red line Assume also that the string is tied loosely enough tosimulate human first-degree heart block. State the effect of this procedureon the atria:ventricle contraction ratio AND explain the underlying physiologyrelated to the effect.

30. 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.

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40- In the brain the frontal lobe has Oa. Voluntary motor activity Ob. Speaking Oc. Reasoning Od. Problem solving Oe. All of the above

5. Describe the conductions of electrical signals through the heart. answer this question with a narrative of the structures involved in initiating and coordinating the contraction of the heart. You need to include the function of each structure. Mention  pacemaker cells, the sinoatrial node, atrioventricular node, internodal pathway, bundle of His, bundle branches, Purkinje fibers, first degree block, second degree block, and third degree block.

6. Describe the parts of the electrocardiogram (ECG) and explain how these electrical events are related to the mechanical events of the cardiac cycle. Reference the Wigger’s diagram. Start at the P-wave and go through to the T-wave. Make sure to clearly state what each wave, interval, and segment represent. Make sure to clearly state the general rule concerning the timing of electrical and mechanical events as well as give specific examples.  Mention P wave, QRS complex, T wave, PR interval, R-R interval, PR segment, ST segment, conduction system of the heart, autorhythmic cardiac cells, contractile cardiac cells, depolarization, repolarization, atria, ventricles, atrioventricular node.

9. Which of the following is/are true? More than one answer may be correct. Choose all that apply) as end-diastolic volume increases, the volume of blood ejected through the aortic semilunar valve increases as sympathetic stimulation of the heart increases, the strength of contraction increases and duration of contraction decreases sympathetic stimulation of cardiac contractile cells increases calcium ion release from the sarcoplasmic reticulum O sympathetic stimulation of the cardiac contractile cells increases the re-uptake of calcium ion by the calcium ATPase pump