PBSE Perfusion Practice Exam Questions & Answer Correct 100%

The major cation found in extracellular fluid is: - Answer Sodium (Na) The primary structural units of proteins are: - Answer L-amino acids Which clotting factor is activated by contact with foreign surfaces, roughened vascular walls, and platelet aggregates? - Answer 12 - Hageman (X11) The effect of plasmin is to: - Answer Limit clotting by splitting fibrin The normal arterio-venous oxygen difference is approximately: - Answer 5 volumes percent Oxygen delivery will be decreased when a low venous oxygen tension and high venous oxyhemoglobin saturation are present due to: - Answer A decrease in p50 A characteristic of the oxygen-dissociation curve for fetal hemoglobin is that: - Answer It shifts to the left of the maternal curve At a given pO2, increasing the pCO2 results in: - Answer Less oxygen bound to the hemoglobin A sample of blood cooled from 37 degrees will undergo what change: - Answer CO2 becomes more soluble and PaCO2 decreases If the diffusion coefficient for oxygen is 1, the diffusion coefficient for carbon dioxide is: - Answer 20.3 In 85-95% of patients, the circumflex artery supplies the: - Answer Lateral aspect of the left ventricle The left anterior descending coronary artery arises from the left: - Answer Main coronary artery Diagonal coronary arteries supply the: - Answer Anterior wall of the left ventricle In 55% of patients, which coronary artery gives rise to blood supply for the SA node? - Answer Right 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 a 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 Normal routes for blood return directly to the interior of the heart: - Answer Coronary sinus, Thebesian Viens, Pulmonary Veins The effect of a calcium channel-blocking drug is: - Answer marked decrease in transmembrane calcium current Calan (verapamil) is indicated for: - Answer Atrial fibrillation with rapid ventricular response 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 anesthetic agent has the shortest duration of action? - Answer Diprivan (propofol)