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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. Opposing friction force to flow - which increases with decreased radius; determined by degree of contraction of arterial smooth muscle






2. Response by CNS when blood pressure is too low






3. 2 chambers of the heart






4. Response by CNS when blood pressure is too high






5. Purpose of erythrocytes?






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






7. 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)






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






9. 2 portal systems to know






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






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






12. Metabolic waste product in breakdown of amino acids






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






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






16. The difference btw systolic and diastolic blood pressures






17. Excessive bleeding that results from defective proteins






18. Body's mechanism of preventing bleeding






19. Flow of blood through a tissue






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






21. 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






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






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






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






25. 73% of CO2 converted to carbonic acid by carbonic anhydrase - and carbonic acid is converted to bicarbonate - which acts a buffer






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






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






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






29. Universal acceptor






30. Neutrophil - eosinophil - and basophil






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






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






33. Number of systole contractions per unit time






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






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






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






37. Fat storage cells of the body






38. AV valve between left atrium and left ventricle






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






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






41. Valves between the large arteries and the ventricles






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






43. Glucose - amino acids - and fats






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






45. 2 ways to increase venous return






46. Universal donor






47. 1. depolarization caused by fast Na channels - where action potential through intercalated discs reaches threshold potential - opening Na channels 2. initial depolarization with Na channels closing and k channels opening - but Ca channels also open 3






48. Highest blood pressure that occurs during ventricular contraction






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






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







Sorry!:) No result found.

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