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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. Amount of blood pumped w/ each systolic contraction






2. Absorbed by the GI tract and brought to the liver via the hepatic portal vein - where they are stored in the liver and enter the blood stream when needed






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






4. 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)






5. Response by CNS when blood pressure is too low






6. Reservoirs where blood collects from veins






7. Flow of blood through a tissue






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






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






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






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






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






13. 2 lymphocytes






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






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






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






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






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






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






20. Glucose - amino acids - and fats






21. Heart rate *stroke volume= (units)






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






23. 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






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






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






26. Fat storage cells of the body






27. ABO blood group and Rh blood group






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






29. Metabolic waste product in breakdown of amino acids






30. Highest blood pressure that occurs during ventricular contraction






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






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






33. 2 portal systems to know






34. Universal donor






35. Buffer in blood. Keeps pH around 7.4






36. Number of systole contractions per unit time






37. At the end of the capillary - is the osmotic pressure high or low?






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






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

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






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






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






43. When do semilunar valves close?






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






45. 3 factors that dictate the affinity of hemoglobin for O2






46. AV valve between left atrium and left ventricle






47. 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






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






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






50. AV valve between right atrium and right ventricle







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


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