Amsect /Basic Science Practice Exam Questions And Answers

Amsect /Basic Science Practice Exam Questions And Answers In 85-95% of patients, the circumflex artery supplies the: - ANSWER lateral aspect of the left ventricle The obtuse marginal artery is a branch of the: - ANSWER circumflex artery Diagonal coronary arteries supply the: - ANSWER anterior wall of the LV . Which arterial wall layer is composed of lamellae of smooth muscle and elastic tissue? - ANSWER tunica media . A characteristic of leukocytes is that they are: - ANSWER larger than platelets The main function of an enzyme is to: - ANSWER increase the rate of biochemical reaction The conformational change of the platelet structure that occurs when stimulated by exposure to foreign surfaces is best described as a: - ANSWER globular form with pseudopodia . The classical pathway of complement activation is initiated by: - ANSWER antibody-antigen reactions Which of the following is NOT a normal route for blood return directly to the interior of the heart? - ANSWER bronchial veins The effect of a calcium channel-blocking drug is: - ANSWER a marked decrease in transmembrane calcium . The most significant side effect of Calan (verapamil) is: - ANSWER severe AV block Persantine (dipyridamole)interferes with the function of: - ANSWER platelets . The cardiovascular effects of Inocor (amrinone) include: - ANSWER decreased pulmonary artery pressure Cephalosporins have little antimicrobial activity against: - ANSWER Pseudomonas aeruginosa. Which of the following anesthetic agents has the shortest duration of action? - ANSWER Diprivan (propofol) . Which of the following effects does NOT occur with morphine sulfate? - ANSWER increased peripheral vascular resistance . Which of the following drugs increases the tolerance of the brain to global ischemia when administered prior to the ischemic episode? - ANSWER pentothal (thiopental) Digitalis preparations are most commonly used to: - ANSWER increase myocardial contractility and control atrial arrhythmias. . The most common site of traumatic aortic disruption due to deceleration injury is: - ANSWER between the left subclavian artery and the ligamentum arteriosum. Obstruction of blood flow through the mitral valve would most likely be caused by a: - ANSWER left atrial myxoma . Atrial myxomas are primarily located: - ANSWER intraseptal Reduced coronary blood flow can result in: - ANSWER an elevation of creatinine phosphokinase (CPK-MB) . Myocardial stunning can be defined as: - ANSWER post ischemic contractile dysfunction in the absence of morphological injury or necrosis. The anastomoses during cardiac transplantation most commonly occur in the following order: - ANSWER left atrium, right atrium, pulmonary artery, aorta. Ventricular septal rupture in adults is most often the result of a(n): - ANSWER MI Myocardial infarction is defined as: - ANSWER local tissue death . The tissue in a true ventricular aneurysm is composed of: - ANSWER thinned myocardium exhibiting paradoxical systolic expansion. . The most frequent cause of cardiogenic shock is: - ANSWER left ventricular infarction . Which of the following is the most accurate enzymatic measurement for the diagnosis of myocardial infarction? - ANSWER creatine kinase-MB . The minimum ACT prior to initiating normothermic cardiopulmonary bypass is: - ANSWER 400 sec A decrease in platelet function is indicated by which TEG parameter? - ANSWER MA-value . As defined by OSHA Standards for Bloodborne Pathogens, which of the following represents an engineering control? - ANSWER puncture resistant containers for sharps . For optimal decompression utilizing a dual-staged venous cannula, the tip of the cannula should lie in the: - ANSWER IVC Cannulation of the aortic arch near the origin of the first great vessel is associated with: - ANSWER selective hyper perfusion of the head . An essential design feature of a single-pass blood cardioplegia system is a: - ANSWER infusion pressure relief valve. 46. Which of the following will minimize air emboli from a cardiotomy reservoir? - ANSWER maintenance of a constant fluid level in the cardiotomy. 47. The difference between total cardiopulmonary bypass and partial cardiopulmonary bypass is that: - ANSWER the bronchial venous return is the only systemic venous return entering the left heart during total cardiopulmonary bypass 48. In hypoplastic left heart syndrome, arterial cannulation is performed via the: - ANSWER ductus arteriosus 49. Extracorporeal microfiber filtration is most frequently employed in the following location during adult cardiopulmonary bypass: - ANSWER cardiotomy reservoir 50. Which flow meter uses acoustics to measure blood flow? - ANSWER doppler