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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. Is cardiac output the same or different btw the two ventricles?






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






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






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






5. Reservoirs where blood collects from veins






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






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






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






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






10. 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)






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






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






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






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






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






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






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






18. What is the direct cause of edema?






19. Valves between the large arteries and the ventricles






20. Protein that maintains oncotic pressure in capillaries






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






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






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






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






25. Control of by ANS of rate of contraction through the Vagus nerve. Postganglionic release in SA node of ACH inhibits depolarization






26. Response by CNS when blood pressure is too low






27. Which is longer - diastole or systole?






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






29. AV valve between right atrium and right ventricle






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






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






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. Universal acceptor






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






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






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






38. Purpose of erythrocytes?






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






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






41. Amount of blood pumped w/ each systolic contraction






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






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






44. Osmotic pressure in capillaries due to plasma proteins






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






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






47. When do semilunar valves close?






48. Plasma that lacks clotting proteins






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






50. 20% transported stuck to hemoglobin; why increased pCO2 decreases affinity of O2







Sorry!:) No result found.

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