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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. AV valve between left atrium and left ventricle






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






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






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






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






6. Essentially 0 mmHg - which results b/c of branching of vessels dissipating pressure to overcome resistance






7. At position 6 - missense mutation substitutes valine for glutamate. valine is hydrophobic - where glutamate was charged. It is an autosomal recessive disease where RBCs accumulated in small vessels - heterozygote for (blank) shows resistance to malar






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






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






10. 2 ways to increase venous return






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






12. 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






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






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






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






16. Path where impulse travels from SA to AV node






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






18. 55% of whole blood that is composed of electrolytes - lipoproteins - sugars - buffer - and metabolic waste






19. Number of systole contractions per unit time






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






21. Destroy parasites and are involved in allergic rxns






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






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






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






25. First branches from the aorta that provide the heart's blood supply






26. Fat storage cells of the body






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






28. Blood clot or scab circulating in bloodstream






29. 2 lymphocytes






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






31. Osmotic pressure in capillaries due to plasma proteins






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






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






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






35. 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






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






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






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






39. AV valve between right atrium and right ventricle






40. Plasma that lacks clotting proteins






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






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






43. Breakdown product of the hemogloblin heme group






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

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






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






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






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






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






50. Valves between the large arteries and the ventricles







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