Test your basic knowledge |

MCAT Biology Circulatory System

Subjects : mcat, health-sciences
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Connected to SA node via internodal tract - and passes signal to Common bundle of His to contract ventricles






2. Aggregate at site of damage to a blood vessel and form a platelet plug to stop bleeding






3. Filling of the ventricles by squeezing of the atria - marks the beginning of the 'dub' sound






4. Control of by ANS of rate of contraction through the Vagus nerve. Postganglionic release in SA node of ACH inhibits depolarization






5. Hematocrit or RBC those compose 35-45% of the blood; cells are non - nucleated and have no organelles. Acquire ATP through glycolysis have biconcave shape to maximize surface area for binding O2






6. 55% of whole blood that is composed of electrolytes - lipoproteins - sugars - buffer - and metabolic waste






7. Gap junctions in the cardiac muscle - where depolarization is communicated directly btw cytoplasm of neighboring cardiac cells






8. The difference btw systolic and diastolic blood pressures






9. What is the only process RBC use to generate ATP?






10. Voltage - gated channels that stay open longer than Na channels and open later responsible for the plateau phase of cardiac muscle contraction






11. 2 chambers of the heart






12. Force per unit area exerted by blood on walls of arteries






13. Mother has Rh - blood with Rh+ antibodies that attack the babies Rh+ blood






14. Plasma that lacks clotting proteins






15. Key proteins for the function of the immune system that are produced and released by B- cells






16. Blood clot or scab circulating in bloodstream






17. What causes tendency of water flow out of blood?






18. AV valve between left atrium and left ventricle






19. Which is longer - diastole or systole?






20. What is the direct cause of edema?






21. Transportation of blood though the body and exchange of material btw blood and tissues






22. Neutrophil - eosinophil - and basophil






23. ABO blood group and Rh blood group






24. Muscular pump that forces blood through series of branching vessels






25. Return of blood to the heart by the vena cava - where increased venous return causes increased stretching of the muscle (increases stroke volume)






26. Highest blood pressure that occurs during ventricular contraction






27. Peptide hormone secreted from the kidneys to increase RBC production in bone marrow






28. Phagocytose bacteria resulting in pus; amoeboid motility and chemotaxis






29. Purpose of erythrocytes?






30. Stretching to greater degree of heart muscle causes more forceful contraction; stretching increase occur by increasing fluid volume






31. Ensure the one - way flow through the circulatory system






32. 2 ways to increase venous return






33. The difference in pressure divided blood flow; controlled by the sympathetic nervous system generating adrenergic tone






34. Open when threshold is reached causing membrane potential to increase/depolarize; operate slower than Na channels






35. Flow of blood from the heart to the lungs - pumped by the right side of the heart






36. Have single layer endothelial cells w/ spaces in between cells called intercellular cleft






37. Buffer in blood. Keeps pH around 7.4






38. First branches from the aorta that provide the heart's blood supply






39. Essentially 0 mmHg - which results b/c of branching of vessels dissipating pressure to overcome resistance






40. Precursor to fibrin - which is necessary for blood clotting






41. 3 factors that dictate the affinity of hemoglobin for O2






42. Path where impulse travels from SA to AV node






43. Difference in pressure=blood flow (L/min)*resitance ^P=Q*R

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


44. Large particles consisting of fats - cholesterol - and carrier proteins; transport lipids through the blood stream






45. Vessels where deoxygenated blood from coronary sinus continue to flow into heart






46. Absorbed in the intestine and packaged in chylomicrons - which enter the lymphatic system - and dumped into the subclavian vein via the thoracic duct; the liver takes fats once in blood - converts them to another lipoprotein and sends them to adipocy






47. Neural sympathetic input by postganglionic neuron of norepinephrine innervating arterial smooth muscle






48. Glucose - amino acids - and fats






49. Where do all components of the blood develop from?






50. Because the veins have essentially 0 pressure - these valves ensure one - way flow - skeletal muscle contraction encourages flow through veins