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






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






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






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






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






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






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






8. Amount of blood pumped w/ each systolic contraction






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






10. 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






11. 2 portal systems to know






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






13. Reservoirs where blood collects from veins






14. 2 lymphocytes






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






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






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






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






19. Metabolic waste product in breakdown of amino acids






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






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






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






23. The difference btw systolic and diastolic blood pressures






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






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






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






27. 73% of CO2 converted to carbonic acid by carbonic anhydrase - and carbonic acid is converted to bicarbonate - which acts a buffer






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






29. 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






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






31. When do Rh antibodies develop?






32. Neural sympathetic input by postganglionic neuron of norepinephrine innervating arterial smooth muscle






33. Flow of blood through a tissue






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






35. What is the direct cause of edema?






36. 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)






37. Breakdown product of the hemogloblin heme group






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






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






40. Hematocrit or RBC those compose 35-45% of the blood; cells are non - nucleated and have no organelles. Acquire ATP through glycolysis have biconcave shape to maximize surface area for binding O2






41. Response by CNS when blood pressure is too low






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






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






44. Osmotic pressure in capillaries due to plasma proteins






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






46. Heart rate *stroke volume= (units)






47. AV valve between left atrium and left ventricle






48. Universal donor






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






50. 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