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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. Reservoirs where blood collects from veins






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






4. 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






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






6. 2 lymphocytes






7. Response by CNS when blood pressure is too low






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






9. Response by CNS when blood pressure is too high






10. Glucose - amino acids - and fats






11. Highest blood pressure that occurs during ventricular contraction






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






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






14. Plasma that lacks clotting proteins






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






16. When do Rh antibodies develop?






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






18. Universal acceptor






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

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






21. 2 ways to increase venous return






22. Neutrophil - eosinophil - and basophil






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






24. Buffer in blood. Keeps pH around 7.4






25. Excessive bleeding that results from defective proteins






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






27. 3 substances that can diffuse through intercellular cleft






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






29. Destroy parasites and are involved in allergic rxns






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






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






32. Universal donor






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






34. Valves between the large arteries and the ventricles






35. Breakdown product of the hemogloblin heme group






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






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






38. AV valve between left atrium and left ventricle






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






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






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






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






44. What is the direct cause of edema?






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






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






47. ABO blood group and Rh blood group






48. Flow of blood through a tissue






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






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