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






2. Reservoirs where blood collects from veins






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






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






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






6. 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






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






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






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






10. Flow of blood through a tissue






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






12. Amount of blood pumped w/ each systolic contraction






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






14. 3 factors that dictate the affinity of hemoglobin for O2






15. Which is longer - diastole or systole?






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






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






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






20. AV valve between left atrium and left ventricle






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






22. Universal donor






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






24. Stretching to greater degree of heart muscle causes more forceful contraction; stretching increase occur by increasing fluid volume






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






26. Neutrophil - eosinophil - and basophil






27. Osmotic pressure in capillaries due to plasma proteins






28. Universal acceptor






29. ABO blood group and Rh blood group






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






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






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






33. Absorbed in the intestine and packaged in chylomicrons - which enter the lymphatic system - and dumped into the subclavian vein via the thoracic duct; the liver takes fats once in blood - converts them to another lipoprotein and sends them to adipocy






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






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






36. 55% of whole blood that is composed of electrolytes - lipoproteins - sugars - buffer - and metabolic waste






37. 2 lymphocytes






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






39. Glucose - amino acids - and fats






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






41. The difference btw systolic and diastolic blood pressures






42. 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






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






44. When do Rh antibodies develop?






45. Pass through the capillaries in order to patrol the tissue for invading organisms; only macrophages and neutrophils can squeeze through cleft






46. Valves between the large arteries and the ventricles






47. 2 ways to increase venous return






48. Buffer in blood. Keeps pH around 7.4






49. Excessive bleeding that results from defective proteins






50. When do semilunar valves close?







Sorry!:) No result found.

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