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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. The difference btw systolic and diastolic blood pressures






2. AV valve between left atrium and left ventricle






3. ABO blood group and Rh blood group






4. As low as pressure gets btw heart beats in arteries






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






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






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






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

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






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






11. Resting membrane potential of -90mV and have long duration action potentials






12. Destroy parasites and are involved in allergic rxns






13. Where are RBCs broken down?






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






15. At position 6 - missense mutation substitutes valine for glutamate. valine is hydrophobic - where glutamate was charged. It is an autosomal recessive disease where RBCs accumulated in small vessels - heterozygote for (blank) shows resistance to malar






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






17. Connected to SA node via internodal tract - and passes signal to Common bundle of His to contract ventricles






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






19. When the valve of a vein fails and back flow occurs; blood not being moved toward the heart






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






21. Confirmation of hemoglobin with O2 bound - where affinity is high 1. pH 2. pCO2 3.






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






23. 20% transported stuck to hemoglobin; why increased pCO2 decreases affinity of O2






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






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






26. Inadequate blood flow - resulting in tissue damage due to shortage of O2 and nutrients - and increase of metabolic waste






27. Capillaries dilate - increasing the cleft size - which allows more H2O to move through to tissues






28. Receives deoxygenated blood from systemic circulation (superior and inferior vena cava)






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






30. Crosses septum and connects to Purkinje fibers to allow coordinated contraction of ventricles. Key is that is slows transmission across septum to allow ventricles to fully fill before contraction






31. Neutrophil - eosinophil - and basophil






32. Contraction of the ventricles - where pressure increases rapidly - causing AV valves to close - Marks the beginning of the 'lub' sound






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






34. Universal acceptor






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






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






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






38. Caused by closure of Ca channels and opening of K channels






39. Response by CNS when blood pressure is too high






40. Highest blood pressure that occurs during ventricular contraction






41. Plasma that lacks clotting proteins






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






43. Flow from the heart to the rest of the body; pumped by the left side of the heart






44. When do Rh antibodies develop?






45. Body's mechanism of preventing bleeding






46. Breakdown product of the hemogloblin heme group






47. CO2 is soluble in H2O - and thus some is dissolved and carried to lungs and tissues in plasma - O2 is not soluble in plasma at all






48. 3 factors that dictate the affinity of hemoglobin for O2






49. Pass through the capillaries in order to patrol the tissue for invading organisms; only macrophages and neutrophils can squeeze through cleft






50. Reservoirs where blood collects from veins