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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. Excessive bleeding that results from defective proteins






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






3. 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






4. Store and release histamine and are involved in allergic rxns






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






6. The principle sugar in blood that maintains a relatively constant concentration for adequate nutrition






7. Reservoirs where blood collects from veins






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






9. 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






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






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






12. 2 ways to increase venous return






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






14. Flow of blood through a tissue






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






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






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






18. Adequate circulation - but O2 supply is reduced (no build up waste products or loss of nutrients)






19. 3 substances that can diffuse through intercellular cleft






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






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






22. Osmotic pressure in capillaries due to plasma proteins






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






24. Universal donor






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






26. Universal acceptor






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






28. Neutrophil - eosinophil - and basophil






29. Protein that maintains oncotic pressure in capillaries






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






31. 2 lymphocytes






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






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






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






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






36. Buffer in blood. Keeps pH around 7.4






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






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






39. Heart rate *stroke volume= (units)






40. 73% of CO2 converted to carbonic acid by carbonic anhydrase - and carbonic acid is converted to bicarbonate - which acts a buffer






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






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






43. Precursor to fibrin - which is necessary for blood clotting






44. Glucose - amino acids - and fats






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






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






47. Resting membrane potential of -90mV and have long duration action potentials






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






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






50. What is the direct cause of edema?