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. 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 min last April, when his HR decreased from 180 to 120 beats after 1 min yesterday, when his HR decreased from 180 to 160 beats/min after 1 min last January, when his HR decreased from 180 to 110 beats/min after 1 min2. What would an incompetent mitral valve cause? increased blood to remain in the right atrium hypertrophy of the right ventricle decreased output from the left ventricle decreased pressure in the left atrium3. What is a normal blood composition? 55% red blood cells, 40% plasma and 5% white blood cells 55% hematocrit, 45% red blood cells 50% plasma, 50% red and white blood cells 45% hematocrit, 55% plasma4. During low- to moderate-intensity exercise, heart rate is increased by: Activation of parasympathetic stimulation Inhibition of sympathetic stimulation Inhibition of parasympathetic stimulation All of the above5. What is the best method to measure a person’s energy expenditure? Direct calorimetry Indirect calorimetry Submaximal exercise test It’s not possible to measure a person’s energy expenditure6. Which of the following statements regarding pulmonary surfactant is true? It is secreted by type I alveolar cells It increases the compliance of the lungs It decreases airway resistance All of the above7. Which type of blood vessel is primarily responsible for redirecting blood flow? Arteries Arterioles Capillaries Veins8. Which factor determines the compliance of the lungs? Surface tension Elasticity of the lung tissue Both surface tension and the elasticity of the lung tissue Neither surface tension nor the elasticity of the lung tissue9. What will a partial obstruction in a coronary artery likely cause? pulmonary embolus hypertension angina attacks myocardial infarction10. 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? 6.0 5.2 4.2 3.011. When two persons (same age, same HRrest) are running with a heart rate of 160 bpm, which conclusion can be drawn? External load is equal Physiological load is equal Both external and physiological load are equal Both external and physiological load are different12. What is a normal partial pressure of CO2 (pCO2) in the arteries? 40 46 100 10513. The O2 demand of the myocardium is NOT directly depending on? Heart rate Stroke volume Systolic blood pressure Rate pressure product14. What does the term arteriosclerosis specifically refer to? development of atheromas in large arteries changes in coronary arteries degeneration with loss of elasticity and obstruction in small arteries ischemia and necrosis in the brain, kidneys, and heart15. During exercise a drop in blood oxygen saturation is observed. This indicates: A diffusion limitation A limitation in cardio circulation Peripheral muscle atrophy Hyperventilation attack16. Ventilation during light to moderate exercise remains constant if the exercise intensity increases increases if the exercise intensity the stays the same will decrease if the exercise intensity increases increases linearly with O2 consumption and CO2 production17. What is the systole? the relaxation phase of the heart the contraction phase of the heart the conducting fibers of the heart the ‘pacemaker’ of the heart18. The discharge rate of the SA node is Increased by parasympathetic stimulation Decreased by sympathetic stimulation Increased by acetylcholine Increased by epinephrine19. Which of the following statements explaining the increase in stroke volume (SV) after aerobic training is correct? preload, contractility, and afterload increase preload, contractility, and afterload decrease preload and contractility increase, afterload decreases preload decreases, contractility and afterload increase20. During the isovolumetric contraction period _________. Ventricular tension rises and heart volume changes Ventricular tension rises and heart volume remains unchanged Ventricular tension remains unchanged and heart volume changes Ventricular tension rises and muscle fiber length changes21. Calcium-channel blocking drugs are effective in: reducing the risk of blood clotting decreasing the attraction of cholesterol into lipid plaques reducing cardiac and smooth muscle contractions decreasing all types of cardiac arrhythmias22. The rate-pressure product (RPP) is an index of myocardial metabolism vascular stiffness circulating catecholamines afterload23. As air enters the trachea and descends toward the lungs, gas exchange with the blood first begins in the_______. Bronchioles Alveolar ducts Alveolar sacs Respiratory bronchioles24. Which of the following is a cause of asthma? Loss of alveoli Inflammation of the bronchioles Elevation of intrapleural pressure to equal atmospheric pressure Environmental chemicals that stimulate beta-2 adrenergic receptors25. 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 muscles Less force reduces the risk of airway damage by inter pulmonary vibrations Huffing techniques are more effective in lung clearance irrespective of the type of COPD Patients with Emphysema can’t cough26. Which of the following statements is not true: The FEV1 is a measure of airway obstruction The FEV1 has been used as a measure for COPD severity The FEV1 is a measure for functional ability The FEV1 is a predictive determinant for complications after surgery27. A normal ECG does NOT contain a QRS complex information on the electrical activity of the heart an atrial depolarization wave information on the ejection fraction of the heart28. What does the a-v O2 difference at rest normally average? 4–5 mL of oxygen per deciliter of blood 6–8 mL of oxygen per deciliter of blood 10–15 mL of oxygen per deciliter of blood 20–25 mL of oxygen per deciliter of blood29. The cardiac muscle is a form of what type of muscle? Skeletal Smooth Striated Voluntary30. An effect of a strenuous aerobic training program could be that the maximal lactic acid concentration during maximal exercise will increase decrease stay more or less constant can't be measured in the blood31. 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.32. A good aerobic training program can result in Increase of max HR Lowering of max HR Increase in total blood volume Decrease in blood plasma volume33. Physical endurance training enhances a person's Maximal blood pressure Maximal stroke volume Maximal heart rate All of the above34. The pacemaker of the heart normally is the Sinoatrial node Atrioventricular node Mitral valve Bundle of His35. An exercise stress test assists in all of the following, except: Revealing abnormal blood pressure responses Screening for heart disease Assessing exercise-related chest symptoms Showing the extent of CHD36. For which of the following would a cardiac pacemaker likely be inserted? angina pectoris heart block congestive heart failure ventricular fibrillation37. In order to estimate the ventilation capacity you can multiply the __________ times 37.5: TLC FVC FEV1 RC38. 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 circulatory Ventilation Pulmonary gas exchange Psychological39. During submaximal exercise both systolic and diastolic blood pressure are much higher than in rest only diastolic blood pressure is higher than in rest both systolic and diastolic blood are the same as in rest systolic blood pressure is higher than in rest40. Which of the following effects may be expected from a beta-adrenergic blocking drug? increasing systemic vasoconstriction decreased sympathetic stimulation of the heart blockage of an angiotensin receptor site increased release of rennin41. In lung emphysema the total lung capacity (TLC) is: Increased Decreased Unchanged Irrelevant42. Which of the following connects the right atrium to the right ventricle? Mitral valve Tricuspid valve Semilunar valve Bicuspid valve43. How many lobes does the right lung consist of? 1 2 3 444. Hollow chambers on the right side of the heart perform which of the following functions? Pump blood throughout the body Pump blood into the lungs Pump blood into the aorta Pump blood into the myocardium45. The SA-node is named after its function in between Arteria and Venae the entrance of the sinus venosis in the right atrium its position in between atria and ventricle septum its position at the atrium near the sinus coronaries46. What is a normal tidal volume? 100 ml 500 ml 1000 ml 5500 ml47. Which changes in the blood will usually NOT be caused by exercise? an increased temperature an increased H+ concentration a decreased pCO2 a decreased pH48. In which direction does the bicuspid valve open? from right ventricle to pulmonary artery from left ventricle to aorta from left ventricle to left atrium from left atrium to left ventricle49. How many semilunar valves does the heart have? 1 2 3 450. Which is normally TRUE about the intrapleural pressure? It is lower than alveolar pressure It is between +5 and +10 mm Hg above atmospheric pressure at functional residual capacity It alternates between being less than, and greater than, atmospheric pressure During a passive exhale, it increases to a value above atmospheric pressureTime is Up!