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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. What is the most important plasma protein in the body? Why?






2. Fat storage cells of the body






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






4. Flow of blood through a tissue






5. Protein that maintains oncotic pressure in capillaries






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






7. Valves between the large arteries and the ventricles






8. Pool of deoxygenated blood at low pressure - which collects blood from coronary veins - Only deoxygenated blood to not enter the right atrium via the vena cava






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






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






11. What is the direct cause of edema?






12. 2 portal systems to know






13. Protein in RBC that transport O2 though the blood since O2 is too hydrophobic in plasma; protein has 4 subunits that change confirmation cooperatively depending on the concentration of O2






14. 2 chambers of the heart






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






16. Buffer in blood. Keeps pH around 7.4






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






18. When do semilunar valves close?






19. Response by CNS when blood pressure is too high






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






21. Connects the two capillary beds of the intestine and the liver






22. Is cardiac output the same or different btw the two ventricles?






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






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






25. AV valve between left atrium and left ventricle






26. 3 factors that dictate the affinity of hemoglobin for O2






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






28. 55% of whole blood that is composed of electrolytes - lipoproteins - sugars - buffer - and metabolic waste






29. Reservoirs where blood collects from veins






30. When do Rh antibodies develop?






31. ABO blood group and Rh blood group






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






33. 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






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






35. Path where impulse travels from SA to AV node






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






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






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






39. The difference btw systolic and diastolic blood pressures






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






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






42. Destroy parasites and are involved in allergic rxns






43. 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






44. Neutrophil - eosinophil - and basophil






45. Active form of fibrinogen - protein forms a mesh that holds platelet plug together to protect wound - ibrinogen is converted to (blank) by thrombin






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






47. Heart rate *stroke volume= (units)






48. Lipoproteins that enter lacteal vessels of lymphatic system in the intestinal wall






49. 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






50. 3 substances that can diffuse through intercellular cleft