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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. Universal donor






2. Universal acceptor






3. Monocyte that phagocytoses debris and microorganisms - has amoeboid motility - and displays chemotaxis






4. Response by CNS when blood pressure is too high






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






6. Where blood passes through 2 sets of capillaries before returning to the heart; Evolved as direct transport routes






7. 2 lymphocytes






8. The difference btw systolic and diastolic blood pressures






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






10. What is the direct cause of edema?






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






12. AV valve between left atrium and left ventricle






13. Region that initiates start of cardiac cycle - which acts as a pacemaker of the heart; has unstable resting potential due to Na leak channels






14. Heart rate *stroke volume= (units)






15. Metabolic waste product in breakdown of amino acids






16. When do Rh antibodies develop?






17. Voltage - gated channels that open quickly; open at threshold potential






18. Request by tissues to increase blood flow - where build up of metabolic waste causes arterioles to dialate






19. Glucose - amino acids - and fats






20. Neutrophil - eosinophil - and basophil






21. Excessive bleeding that results from defective proteins






22. Protein that maintains oncotic pressure in capillaries






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






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






25. 20% transported stuck to hemoglobin; why increased pCO2 decreases affinity of O2






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






27. Confirmation of hemoglobin with no O2 bound - so it has low affinity






28. Valves between the ventricle and the atria to prevent back flow






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






30. Store and release histamine and are involved in allergic rxns






31. Plasma that lacks clotting proteins






32. Buffer in blood. Keeps pH around 7.4






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

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






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






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






37. Vessels that carry blood back to the heart at low pressure






38. Bone marrow cells that give rise to RBC and platelets






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






40. Pump blood out of the heart at high pressures into arteries






41. Produced during cell metabolism and diffuses through the endothelial cells into the blood stream - where it is picked up by the liver and converted to forms that can be excreted (all other wastes are picked up by the kidneys)






42. 3 factors that dictate the affinity of hemoglobin for O2






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






44. Rh factor that follows dominant pattern (Rh+ in heterozygote)






45. Site of exchange btw blood and tissues; smallest vessels that allow one RBC through at a time






46. Tissue which the cytoplasm of different cells communicate via gap junctions






47. Which is longer - diastole or systole?






48. Where are RBCs broken down?






49. Vessels that carry blood away from the heart at high pressure






50. Receptors in the carotid arteries and aortic arch that notify CNS if blood pressure is high or low