Physiology 2 Welcome to your Physiology 2: Cardiopulmonary Quiz This quiz has 50 multiple choice questions. Make sure to mark an answer for every question! You will get the results mailed to the email address indicated below! Good luck! EMAIL NAME 1. Which of the following statements regarding pulmonary surfactant is true?It is secreted by type I alveolar cellsIt increases the compliance of the lungsIt decreases airway resistanceAll of the above2. Why does ventricular fibrillation result in cardiac arrest?Delayed conduction through the AV node blocks ventricular stimulation.Insufficient blood is supplied to the myocardium.The ventricles contract before the atria.Parasympathetic stimulation depresses the SA node.3. Which changes in the blood will usually NOT be caused by exercise?an increased temperaturean increased H+ concentrationa decreased pCO2a decreased pH4. Jack has been training for a 100 km cycling race over the last couple of years and has been keeping track of his postworkout heart rate recovery. When was he probably most aerobically fit?last June, when his HR decreased from 180 to 150 beats/min after 1 minlast April, when his HR decreased from 180 to 120 beats after 1 minyesterday, when his HR decreased from 180 to 160 beats/min after 1 minlast January, when his HR decreased from 180 to 110 beats/min after 1 min5. Which type of blood vessel is primarily responsible for redirecting blood flow?ArteriesArteriolesCapillariesVeins6. What does the term arteriosclerosis specifically refer to?development of atheromas in large arterieschanges in coronary arteriesdegeneration with loss of elasticity and obstruction in small arteriesischemia and necrosis in the brain, kidneys, and heart7. During submaximal exerciseboth systolic and diastolic blood pressure are much higher than in restonly diastolic blood pressure is higher than in restboth systolic and diastolic blood are the same as in restsystolic blood pressure is higher than in rest8. What is the systole?the relaxation phase of the heartthe contraction phase of the heartthe conducting fibers of the heartthe ‘pacemaker’ of the heart9. During exercise a drop in blood oxygen saturation is observed. This indicates:A diffusion limitationA limitation in cardio circulationPeripheral muscle atrophyHyperventilation attack10. Which of the following statements explaining the increase in stroke volume (SV) after aerobic training is correct?preload, contractility, and afterload increasepreload, contractility, and afterload decreasepreload and contractility increase, afterload decreasespreload decreases, contractility and afterload increase11. The pacemaker of the heart normally is theSinoatrial nodeAtrioventricular nodeMitral valveBundle of His12. What is a normal blood composition?55% red blood cells, 40% plasma and 5% white blood cells55% hematocrit, 45% red blood cells50% plasma, 50% red and white blood cells45% hematocrit, 55% plasma13. What does the a-v O2 difference at rest normally average?4–5 mL of oxygen per deciliter of blood6–8 mL of oxygen per deciliter of blood10–15 mL of oxygen per deciliter of blood20–25 mL of oxygen per deciliter of blood14. Which factor determines the compliance of the lungs?Surface tensionElasticity of the lung tissueBoth surface tension and the elasticity of the lung tissueNeither surface tension nor the elasticity of the lung tissue15. In lung emphysema the total lung capacity (TLC) is:IncreasedDecreasedUnchangedIrrelevant16. A good aerobic training program can result inIncrease of max HRLowering of max HRIncrease in total blood volumeDecrease in blood plasma volume17. Ventilation during light to moderate exerciseremains constant if the exercise intensity increasesincreases if the exercise intensity the stays the samewill decrease if the exercise intensity increasesincreases linearly with O2 consumption and CO2 production18. Which of the following connects the right atrium to the right ventricle?Mitral valveTricuspid valveSemilunar valveBicuspid valve19. What is a normal partial pressure of CO2 (pCO2) in the arteries?404610010520. What would an incompetent mitral valve cause?increased blood to remain in the right atriumhypertrophy of the right ventricledecreased output from the left ventricledecreased pressure in the left atrium21. During low- to moderate-intensity exercise, heart rate is increased by:Activation of parasympathetic stimulationInhibition of sympathetic stimulationInhibition of parasympathetic stimulationAll of the above22. Which of the following statements is not true:The FEV1 is a measure of airway obstructionThe FEV1 has been used as a measure for COPD severityThe FEV1 is a measure for functional abilityThe FEV1 is a predictive determinant for complications after surgery23. In order to estimate the ventilation capacity you can multiply the __________ times 37.5:TLCFVCFEV1RC24. What is the best method to measure a person’s energy expenditure?Direct calorimetryIndirect calorimetrySubmaximal exercise testIt’s not possible to measure a person’s energy expenditure25. The SA-node is named afterits function in between Arteria and Venaethe entrance of the sinus venosis in the right atriumits position in between atria and ventricle septumits position at the atrium near the sinus coronaries26. During the isovolumetric contraction period _________.Ventricular tension rises and heart volume changesVentricular tension rises and heart volume remains unchangedVentricular tension remains unchanged and heart volume changesVentricular tension rises and muscle fiber length changes27. The cardiac muscle is a form of what type of muscle?SkeletalSmoothStriatedVoluntary28. The rate-pressure product (RPP) is an index ofmyocardial metabolismvascular stiffnesscirculating catecholaminesafterload29. Which of the following is a cause of asthma?Loss of alveoliInflammation of the bronchiolesElevation of intrapleural pressure to equal atmospheric pressureEnvironmental chemicals that stimulate beta-2 adrenergic receptors30. What is a normal tidal volume?100 ml500 ml1000 ml5500 ml31. An effect of a strenuous aerobic training program could be that the maximal lactic acid concentration during maximal exercise willincreasedecreasestay more or less constantcan't be measured in the blood32. Which is normally TRUE about the intrapleural pressure?It is lower than alveolar pressureIt is between +5 and +10 mm Hg above atmospheric pressure at functional residual capacityIt alternates between being less than, and greater than, atmospheric pressureDuring a passive exhale, it increases to a value above atmospheric pressure33. When two persons (same age, same HRrest) are running with a heart rate of 160 bpm, which conclusion can be drawn?External load is equalPhysiological load is equalBoth external and physiological load are equalBoth external and physiological load are different34. The huffing technique is preferable over normal coughing in emphysema patients because of:Less force is required which limits the required the strain on expiratory musclesLess force reduces the risk of airway damage by inter pulmonary vibrationsHuffing techniques are more effective in lung clearance irrespective of the type of COPDPatients with Emphysema can’t cough35. The O2 demand of the myocardium is NOT directly depending on?Heart rateStroke volumeSystolic blood pressureRate pressure product36. In which direction does the bicuspid valve open?from right ventricle to pulmonary arteryfrom left ventricle to aortafrom left ventricle to left atriumfrom left atrium to left ventricle37. How many lobes does the right lung consist of? 123438. The discharge rate of the SA node isIncreased by parasympathetic stimulationDecreased by sympathetic stimulationIncreased by acetylcholineIncreased by epinephrine39. Hollow chambers on the right side of the heart perform which of the following functions?Pump blood throughout the bodyPump blood into the lungsPump blood into the aortaPump blood into the myocardium40. A normal ECG does NOT containa QRS complexinformation on the electrical activity of the heartan atrial depolarization waveinformation on the ejection fraction of the heart41. For which of the following would a cardiac pacemaker likely be inserted?angina pectorisheart blockcongestive heart failureventricular fibrillation42. Calcium-channel blocking drugs are effective in:reducing the risk of blood clottingdecreasing the attraction of cholesterol into lipid plaquesreducing cardiac and smooth muscle contractionsdecreasing all types of cardiac arrhythmias43. As air enters the trachea and descends toward the lungs, gas exchange with the blood first begins in the_______.BronchiolesAlveolar ductsAlveolar sacsRespiratory bronchioles44. Physical endurance training enhances a person'sMaximal blood pressureMaximal stroke volumeMaximal heart rateAll of the above45. During a maximum exercise test the following is observed: Pa02 = unchanged, PaC02= decreased, D(A-a)02 = < 2kpa, Heart rate = near predicted, Ventilation = <70% of predicted. This indicates a ___________ limitation:Cardio circulatoryVentilationPulmonary gas exchangePsychological46. Which of the following effects may be expected from a beta-adrenergic blocking drug?increasing systemic vasoconstrictiondecreased sympathetic stimulation of the heartblockage of an angiotensin receptor siteincreased release of rennin47. When lying down, a subject's respiratory rate is 12 breaths per minute, his anatomical dead space is 150 ml, and his minute ventilation is 7 L/min. Which of these is closest to his alveolar ventilation in liters per minute?6.05.24.23.048. What will a partial obstruction in a coronary artery likely cause?pulmonary embolushypertensionangina attacksmyocardial infarction49. An exercise stress test assists in all of the following, except:Revealing abnormal blood pressure responsesScreening for heart diseaseAssessing exercise-related chest symptomsShowing the extent of CHD50. How many semilunar valves does the heart have?1234Time is Up!