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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. Osmotic pressure in capillaries due to plasma proteins






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






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






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






5. Glycoproteins that are coded for by 3 alleles (A - B - i)






6. 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






7. Neutrophil - eosinophil - and basophil






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






9. Fat storage cells of the body






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






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






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

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






14. Protein that maintains oncotic pressure in capillaries






15. The difference btw systolic and diastolic blood pressures






16. AV valve between right atrium and right ventricle






17. Glucose - amino acids - and fats






18. 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






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






20. Body's mechanism of preventing bleeding






21. When do Rh antibodies develop?






22. Response by CNS when blood pressure is too low






23. 55% of whole blood that is composed of electrolytes - lipoproteins - sugars - buffer - and metabolic waste






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






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






26. Metabolic waste product in breakdown of amino acids






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






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






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






30. Maximize entry of Ca into the cell by allowing entry of Ca extracellular environment; leads to contraction of actin - myosin fibers






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






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






33. 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)






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






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






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






37. Reservoirs where blood collects from veins






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






39. Universal acceptor






40. 20% transported stuck to hemoglobin; why increased pCO2 decreases affinity of O2






41. AV valve between left atrium and left ventricle






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






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






44. Highest blood pressure that occurs during ventricular contraction






45. ABO blood group and Rh blood group






46. Occurs when increased cardiac output is needed; the postganglionic nerve directly innervates the heart - releasing norepinephrine - increasing heart rate and force of contraction






47. Breakdown product of the hemogloblin heme group






48. Plasma that lacks clotting proteins






49. 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






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