Test your basic knowledge |

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






2. 20% transported stuck to hemoglobin; why increased pCO2 decreases affinity of O2






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






4. Plasma that lacks clotting proteins






5. Destroy parasites and are involved in allergic rxns






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






7. Excessive bleeding that results from defective proteins






8. Neutrophil - eosinophil - and basophil






9. 3 substances that can diffuse through intercellular cleft






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






11. Open when threshold is reached causing membrane potential to increase/depolarize; operate slower than Na channels






12. Transportation of blood though the body and exchange of material btw blood and tissues






13. What is the direct cause of edema?






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






15. Response by CNS when blood pressure is too high






16. 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






17. Highest blood pressure that occurs during ventricular contraction






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






19. Protein that maintains oncotic pressure in capillaries






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






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






22. 2 chambers of the heart






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






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






25. Why is the SA node the primary pacemaker?






26. Amount of blood pumped w/ each systolic contraction






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






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






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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


30. When do Rh antibodies develop?






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






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






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






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






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






36. The difference btw systolic and diastolic blood pressures






37. 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






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






39. Flow of blood through a tissue






40. Allow Na to leak across membrane - causing cell potential to get closer to threshold potential; allow threshold to be reached for Ca channels to open let Ca into the cell






41. Where are RBCs broken down?






42. Buffer in blood. Keeps pH around 7.4






43. Which is longer - diastole or systole?






44. Response by CNS when blood pressure is too low






45. 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






46. 55% of whole blood that is composed of electrolytes - lipoproteins - sugars - buffer - and metabolic waste






47. Reservoirs where blood collects from veins






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






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






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